Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1

27 files changed, 3670 insertions, 0 deletions

diff --git a/mailnews/mapi/mapiDll/Makefile.in b/mailnews/mapi/mapiDll/Makefile.in
new file mode 100644
index 000000000..b6769e314
--- /dev/null
+++ b/mailnews/mapi/mapiDll/Makefile.in
@@ -0,0 +1,6 @@
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+EMBED_MANIFEST_AT = 2
diff --git a/mailnews/mapi/mapiDll/Mapi32.DEF b/mailnews/mapi/mapiDll/Mapi32.DEF
new file mode 100644
index 000000000..5e95396b0
--- /dev/null
+++ b/mailnews/mapi/mapiDll/Mapi32.DEF
@@ -0,0 +1,21 @@
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0. If a copy of the MPL was not distributed with this
+; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+LIBRARY         mozMapi32.dll
+
+EXPORTS
+        MAPILogon
+        MAPILogoff
+        MAPISendMail
+        MAPISendDocuments
+        MAPIFindNext
+        MAPIReadMail
+        MAPISaveMail
+        MAPIDeleteMail
+        MAPIAddress
+        MAPIDetails
+        MAPIResolveName
+        MAPIFreeBuffer
+        GetMapiDllVersion
+
diff --git a/mailnews/mapi/mapiDll/MapiDll.cpp b/mailnews/mapi/mapiDll/MapiDll.cpp
new file mode 100644
index 000000000..b6b6ddbf7
--- /dev/null
+++ b/mailnews/mapi/mapiDll/MapiDll.cpp
@@ -0,0 +1,513 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#pragma warning (disable : 4996) // MAPILogoff is deprecated
+
+#include <windows.h>
+#include <tchar.h>
+#include <mapidefs.h>
+#include <mapi.h>
+#include "msgMapi.h"
+
+#define MAX_RECIPS  2000
+#define MAX_FILES   100
+
+
+#define           MAX_NAME_LEN    256
+#define           MAX_PW_LEN      256
+#define           MAX_MSGINFO_LEN 512
+#define           MAX_POINTERS    32
+
+const CLSID CLSID_CMapiImp = {0x29f458be, 0x8866, 0x11d5,
+                              {0xa3, 0xdd, 0x0, 0xb0, 0xd0, 0xf3, 0xba, 0xa7}};
+const IID IID_nsIMapi = {0x6EDCD38E,0x8861,0x11d5,
+                        {0xA3,0xDD,0x00,0xB0,0xD0,0xF3,0xBA,0xA7}};
+
+DWORD tId = 0;
+
+#define   MAPI_MESSAGE_TYPE     0
+#define   MAPI_RECIPIENT_TYPE   1
+ 
+typedef struct {
+  LPVOID    lpMem;
+  UCHAR     memType;
+} memTrackerType;
+
+
+// this can't be right.
+memTrackerType    memArray[MAX_POINTERS];
+
+//
+// For remembering memory...how ironic.
+//
+void
+SetPointerArray(LPVOID ptr, BYTE type)
+{
+int i;
+  
+  for (i=0; i<MAX_POINTERS; i++)
+  {
+    if (memArray[i].lpMem == NULL)
+    {
+      memArray[i].lpMem = ptr;
+      memArray[i].memType = type;
+      break;
+    }
+  }
+}
+
+
+BOOL WINAPI DllMain(HINSTANCE aInstance, DWORD aReason, LPVOID aReserved)
+{
+    switch (aReason)
+    {
+        case DLL_PROCESS_ATTACH : tId = TlsAlloc();
+                                  if (tId == 0xFFFFFFFF)
+                                      return FALSE;
+                                  break;
+
+        case DLL_PROCESS_DETACH : TlsFree(tId);
+                                  break;
+    }
+    return TRUE;
+}
+
+BOOL InitMozillaReference(nsIMapi **aRetValue)
+{
+    // Check whether this thread has a valid Interface
+    // by looking into thread-specific-data variable
+
+    *aRetValue = (nsIMapi *)TlsGetValue(tId);
+
+    // Check whether the pointer actually resolves to
+    // a valid method call; otherwise mozilla is not running
+
+    if ((*aRetValue) && (*aRetValue)->IsValid() == S_OK)
+         return TRUE;
+
+    HRESULT hRes = ::CoInitialize(NULL) ;
+
+    hRes = ::CoCreateInstance(CLSID_CMapiImp, NULL, CLSCTX_LOCAL_SERVER,
+                                         IID_nsIMapi, (LPVOID *)aRetValue);
+
+    if (hRes == S_OK && (*aRetValue)->Initialize() == S_OK)
+        if (TlsSetValue(tId, (LPVOID)(*aRetValue)))
+            return TRUE;
+
+    // Either CoCreate or TlsSetValue failed; so return FALSE
+
+    if ((*aRetValue))
+        (*aRetValue)->Release();
+
+    ::CoUninitialize();
+    return FALSE;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////
+// The MAPILogon function begins a Simple MAPI session, loading the default message ////
+// store and address book providers                            ////
+////////////////////////////////////////////////////////////////////////////////////////
+
+ULONG FAR PASCAL MAPILogon(ULONG aUIParam, LPTSTR aProfileName,
+                            LPTSTR aPassword, FLAGS aFlags,
+                            ULONG aReserved, LPLHANDLE aSession)
+{
+    HRESULT hr = 0;
+    ULONG nSessionId = 0;
+    nsIMapi *pNsMapi = NULL;
+
+    if (!InitMozillaReference(&pNsMapi))
+        return MAPI_E_FAILURE;
+
+    if (!(aFlags & MAPI_UNICODE))
+    {
+        // Need to convert the parameters to Unicode.
+
+        char *pUserName = (char *) aProfileName;
+        char *pPassWord = (char *) aPassword;
+
+        TCHAR ProfileName[MAX_NAME_LEN] = {0};
+        TCHAR PassWord[MAX_PW_LEN] = {0};
+
+        if (pUserName != NULL)
+        {
+            if (!MultiByteToWideChar(CP_ACP, 0, pUserName, -1, ProfileName,
+                                                            MAX_NAME_LEN))
+                return MAPI_E_FAILURE;
+        }
+
+        if (pPassWord != NULL)
+        {
+            if (!MultiByteToWideChar(CP_ACP, 0, pPassWord, -1, PassWord,
+                                                            MAX_NAME_LEN))
+                return MAPI_E_FAILURE;
+        }
+
+        hr = pNsMapi->Login(aUIParam, ProfileName, PassWord, aFlags,
+                                                        &nSessionId);
+    }
+    else
+        hr = pNsMapi->Login(aUIParam, aProfileName, aPassword,
+                                                aFlags, &nSessionId);
+    if (hr == S_OK)
+        (*aSession) = (LHANDLE) nSessionId;
+    else
+        return nSessionId;
+
+    return SUCCESS_SUCCESS;
+}
+
+ULONG FAR PASCAL MAPILogoff (LHANDLE aSession, ULONG aUIParam,
+                                            FLAGS aFlags, ULONG aReserved)
+{
+    nsIMapi *pNsMapi = (nsIMapi *)TlsGetValue(tId);
+    if (pNsMapi != NULL)
+    {
+        if (pNsMapi->Logoff((ULONG) aSession) == S_OK)
+            pNsMapi->Release();
+        pNsMapi = NULL;
+    }
+
+    TlsSetValue(tId, NULL);
+
+    ::CoUninitialize();
+
+    return SUCCESS_SUCCESS;
+}
+
+ULONG FAR PASCAL MAPISendMail (LHANDLE lhSession, ULONG ulUIParam, nsMapiMessage *lpMessage,
+                FLAGS flFlags, ULONG ulReserved )
+{
+    HRESULT hr = 0;
+    BOOL bTempSession = FALSE ;
+    nsIMapi *pNsMapi = NULL;
+
+    if (!InitMozillaReference(&pNsMapi))
+        return MAPI_E_FAILURE;
+
+    if (lpMessage->nRecipCount > MAX_RECIPS)
+        return MAPI_E_TOO_MANY_RECIPIENTS ;
+
+    if (lpMessage->nFileCount > MAX_FILES)
+        return MAPI_E_TOO_MANY_FILES ;
+
+    if ( (!(flFlags & MAPI_DIALOG)) && (lpMessage->lpRecips == NULL) )
+        return MAPI_E_UNKNOWN_RECIPIENT ;
+
+    if (!lhSession || pNsMapi->IsValidSession(lhSession) != S_OK)
+    {
+        FLAGS LoginFlag ;
+        if ( (flFlags & MAPI_LOGON_UI) && (flFlags & MAPI_NEW_SESSION) )
+            LoginFlag = MAPI_LOGON_UI | MAPI_NEW_SESSION ;
+        else if (flFlags & MAPI_LOGON_UI) 
+            LoginFlag = MAPI_LOGON_UI ;
+
+        hr = MAPILogon (ulUIParam, (LPTSTR) NULL, (LPTSTR) NULL, LoginFlag, 0, &lhSession) ;
+        if (hr != SUCCESS_SUCCESS)
+            return MAPI_E_LOGIN_FAILURE ;
+        bTempSession = TRUE ;
+    }
+
+    // we need to deal with null data passed in by MAPI clients, specially when MAPI_DIALOG is set.
+    // The MS COM type lib code generated by MIDL for the MS COM interfaces checks for these parameters
+    // to be non null, although null is a valid value for them here. 
+    nsMapiRecipDesc * lpRecips ;
+    nsMapiFileDesc * lpFiles ;
+
+    nsMapiMessage Message ;
+    memset (&Message, 0, sizeof (nsMapiMessage) ) ;
+    nsMapiRecipDesc Recipient ;
+    memset (&Recipient, 0, sizeof (nsMapiRecipDesc) );
+    nsMapiFileDesc Files ;
+    memset (&Files, 0, sizeof (nsMapiFileDesc) ) ;
+
+    if(!lpMessage)
+    {
+       lpMessage = &Message ;
+    }
+    if(!lpMessage->lpRecips)
+    {
+        lpRecips = &Recipient ;
+    }
+    else
+        lpRecips = lpMessage->lpRecips ;
+    if(!lpMessage->lpFiles)
+    {
+        lpFiles = &Files ;
+    }
+    else
+        lpFiles = lpMessage->lpFiles ;
+
+    hr = pNsMapi->SendMail (lhSession, lpMessage, 
+                            (short) lpMessage->nRecipCount, lpRecips,
+                            (short) lpMessage->nFileCount, lpFiles,
+                            flFlags, ulReserved);
+
+    // we are seeing a problem when using Word, although we return success from the MAPI support
+    // MS COM interface in mozilla, we are getting this error here. This is a temporary hack !!
+    if (hr == 0x800703e6)
+        hr = SUCCESS_SUCCESS;
+    
+    if (bTempSession)
+        MAPILogoff (lhSession, ulUIParam, 0,0) ;
+
+    return hr ; 
+}
+
+
+ULONG FAR PASCAL MAPISendDocuments(ULONG ulUIParam, LPTSTR lpszDelimChar, LPTSTR lpszFilePaths,
+                                LPTSTR lpszFileNames, ULONG ulReserved)
+{
+    LHANDLE lhSession ;
+    nsIMapi *pNsMapi = NULL;
+
+    if (!InitMozillaReference(&pNsMapi))
+        return MAPI_E_FAILURE;
+
+    unsigned long result = MAPILogon (ulUIParam, (LPTSTR) NULL, (LPTSTR) NULL, MAPI_LOGON_UI, 0, &lhSession) ;
+    if (result != SUCCESS_SUCCESS)
+        return MAPI_E_LOGIN_FAILURE ;
+
+    HRESULT hr;
+
+    hr = pNsMapi->SendDocuments(lhSession, (LPTSTR) lpszDelimChar, (LPTSTR) lpszFilePaths, 
+                                    (LPTSTR) lpszFileNames, ulReserved) ;
+
+    MAPILogoff (lhSession, ulUIParam, 0,0) ;
+
+    return hr ;
+}
+
+ULONG FAR PASCAL MAPIFindNext(LHANDLE lhSession, ULONG ulUIParam, LPTSTR lpszMessageType,
+                              LPTSTR lpszSeedMessageID, FLAGS flFlags, ULONG ulReserved,
+                              unsigned char lpszMessageID[64])
+{
+  nsIMapi *pNsMapi = NULL;
+
+  if (!InitMozillaReference(&pNsMapi))
+    return MAPI_E_FAILURE;
+
+  if (lhSession == 0)
+    return MAPI_E_INVALID_SESSION;
+
+  if (!lpszMessageType)
+    lpszMessageType = L"";
+
+  if (!lpszSeedMessageID)
+    lpszSeedMessageID = L"";
+
+  return pNsMapi->FindNext(lhSession, ulUIParam, lpszMessageType,
+                              lpszSeedMessageID, flFlags, ulReserved,
+                              lpszMessageID) ;
+}
+
+
+ULONG FAR PASCAL MAPIReadMail(LHANDLE lhSession, ULONG ulUIParam, LPTSTR lpszMessageID,
+                              FLAGS flFlags, ULONG ulReserved, nsMapiMessage **lppMessage)
+{
+  nsIMapi *pNsMapi = NULL;
+
+  if (!InitMozillaReference(&pNsMapi))
+    return MAPI_E_FAILURE;
+
+  if (lhSession == 0)
+    return MAPI_E_INVALID_SESSION;
+
+  return pNsMapi->ReadMail(lhSession, ulUIParam,
+                              lpszMessageID, flFlags, ulReserved,
+                              lppMessage) ;
+
+}
+
+ULONG FAR PASCAL MAPISaveMail(LHANDLE lhSession, ULONG ulUIParam, lpnsMapiMessage lpMessage,
+                              FLAGS flFlags, ULONG ulReserved, LPTSTR lpszMessageID)
+{
+  nsIMapi *pNsMapi = NULL;
+
+  if (lhSession == 0)
+    return MAPI_E_INVALID_SESSION;
+
+  if (!InitMozillaReference(&pNsMapi))
+    return MAPI_E_FAILURE;
+
+  return MAPI_E_FAILURE;
+}
+
+ULONG FAR PASCAL MAPIDeleteMail(LHANDLE lhSession, ULONG ulUIParam, LPTSTR lpszMessageID,
+                                FLAGS flFlags, ULONG ulReserved)
+{
+  nsIMapi *pNsMapi = NULL;
+
+  if (lhSession == 0)
+    return MAPI_E_INVALID_SESSION;
+
+  if (!InitMozillaReference(&pNsMapi))
+    return MAPI_E_FAILURE;
+
+  return pNsMapi->DeleteMail(lhSession, ulUIParam,
+                              lpszMessageID, flFlags, ulReserved) ;
+}
+
+ULONG FAR PASCAL MAPIAddress(LHANDLE lhSession, ULONG ulUIParam, LPTSTR lpszCaption,
+                             ULONG nEditFields, LPTSTR lpszLabels, ULONG nRecips,
+                             lpMapiRecipDesc lpRecips, FLAGS flFlags,
+                             ULONG ulReserved, LPULONG lpnNewRecips,
+                             lpMapiRecipDesc FAR *lppNewRecips)
+{
+    return MAPI_E_NOT_SUPPORTED;
+}
+
+ULONG FAR PASCAL MAPIDetails(LHANDLE lhSession, ULONG ulUIParam, lpMapiRecipDesc lpRecip,
+                             FLAGS flFlags, ULONG ulReserved)
+{
+    return MAPI_E_NOT_SUPPORTED;
+}
+
+ULONG FAR PASCAL MAPIResolveName(LHANDLE lhSession, ULONG ulUIParam, LPTSTR lpszName,
+                                 FLAGS flFlags, ULONG ulReserved, lpMapiRecipDesc FAR *lppRecip)
+{
+  char* lpszRecipName = new char[(strlen((const char*)lpszName) + 1)];
+  if (lpszRecipName == NULL)
+    return MAPI_E_INSUFFICIENT_MEMORY;
+  char* lpszRecipAddress = new char[(strlen((const char*)lpszName) + 6)];
+  if (!lpszRecipAddress) {
+    delete[] lpszRecipName;
+    return MAPI_E_INSUFFICIENT_MEMORY;
+  }
+  strcpy(lpszRecipName, (const char*)lpszName);
+  strcpy(lpszRecipAddress, (const char*)lpszName);
+  (*lppRecip) = (lpMapiRecipDesc FAR)malloc(sizeof(MapiRecipDesc));
+  if (!(*lppRecip)) {
+    delete[] lpszRecipName;
+    delete[] lpszRecipAddress;
+    return MAPI_E_INSUFFICIENT_MEMORY;
+  }
+  (*lppRecip)->ulRecipClass = 1;
+  (*lppRecip)->lpszName = lpszRecipName;
+  (*lppRecip)->lpszAddress = lpszRecipAddress;
+  (*lppRecip)->ulEIDSize = 0;
+  (*lppRecip)->lpEntryID = 0;
+  return SUCCESS_SUCCESS;
+}
+
+void FreeMAPIRecipient(lpMapiRecipDesc pv);
+void FreeMAPIMessage(lpMapiMessage pv);
+
+ULONG FAR PASCAL MAPIFreeBuffer(LPVOID pv)
+{
+  int   i;
+
+  if (!pv)
+    return S_OK;
+
+  for (i=0; i<MAX_POINTERS; i++)
+  {
+    if (pv == memArray[i].lpMem)
+    {
+      if (memArray[i].memType == MAPI_MESSAGE_TYPE)
+      {
+        FreeMAPIMessage((MapiMessage *)pv);
+        memArray[i].lpMem = NULL;
+      }
+      else if (memArray[i].memType == MAPI_RECIPIENT_TYPE)
+      {
+        FreeMAPIRecipient((MapiRecipDesc *)pv);
+        memArray[i].lpMem = NULL;
+      }
+    }
+  }
+
+  pv = NULL;
+  return S_OK;
+}
+
+ULONG FAR PASCAL GetMapiDllVersion()
+{
+  return 94;
+}
+
+void
+FreeMAPIFile(lpMapiFileDesc pv)
+{
+  if (!pv)
+    return;
+
+  if (pv->lpszPathName != NULL)
+    free(pv->lpszPathName);
+
+  if (pv->lpszFileName != NULL)
+    free(pv->lpszFileName);
+}
+
+void
+FreeMAPIMessage(lpMapiMessage pv)
+{
+  ULONG i;
+
+  if (!pv)
+    return;
+
+  if (pv->lpszSubject != NULL)
+    free(pv->lpszSubject);
+
+  if (pv->lpszNoteText)
+      free(pv->lpszNoteText);
+
+  if (pv->lpszMessageType)
+    free(pv->lpszMessageType);
+
+  if (pv->lpszDateReceived)
+    free(pv->lpszDateReceived);
+
+  if (pv->lpszConversationID)
+    free(pv->lpszConversationID);
+
+  if (pv->lpOriginator)
+    FreeMAPIRecipient(pv->lpOriginator);
+
+  for (i=0; i<pv->nRecipCount; i++)
+  {
+    if (&(pv->lpRecips[i]) != NULL)
+    {
+      FreeMAPIRecipient(&(pv->lpRecips[i]));
+    }
+  }
+
+  if (pv->lpRecips != NULL)
+  {
+    free(pv->lpRecips);
+  }
+
+  for (i=0; i<pv->nFileCount; i++)
+  {
+    if (&(pv->lpFiles[i]) != NULL)
+    {
+      FreeMAPIFile(&(pv->lpFiles[i]));
+    }
+  }
+
+  if (pv->lpFiles != NULL)
+  {
+    free(pv->lpFiles);
+  }
+
+  free(pv);
+  pv = NULL;
+}
+
+void
+FreeMAPIRecipient(lpMapiRecipDesc pv)
+{
+  if (!pv)
+    return;
+
+  if (pv->lpszName != NULL)
+    free(pv->lpszName);
+
+  if (pv->lpszAddress != NULL)
+    free(pv->lpszAddress);
+
+  if (pv->lpEntryID != NULL)
+    free(pv->lpEntryID);
+}
diff --git a/mailnews/mapi/mapiDll/module.ver b/mailnews/mapi/mapiDll/module.ver
new file mode 100644
index 000000000..d62b9e99c
--- /dev/null
+++ b/mailnews/mapi/mapiDll/module.ver
@@ -0,0 +1,7 @@
+WIN32_MODULE_FILEVERSION=0,8,0,0
+WIN32_MODULE_FILEVERSION_STRING=0.8
+WIN32_MODULE_COPYRIGHT=ŠThunderbird and Mozilla Developers, according to the MPL 1.1/GPL 2.0/LGPL 2.1 licenses, as applicable.
+WIN32_MODULE_COMPANYNAME=Mozilla.org
+WIN32_MODULE_TRADEMARKS=Mozilla
+WIN32_MODULE_COMMENT=Mozilla Thunderbird MAPI Dll
+
diff --git a/mailnews/mapi/mapiDll/moz.build b/mailnews/mapi/mapiDll/moz.build
new file mode 100644
index 000000000..d501c2308
--- /dev/null
+++ b/mailnews/mapi/mapiDll/moz.build
@@ -0,0 +1,24 @@
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Statically link against the CRT, so that we don't go hunting around for it
+# and not find it when we're loaded into explorer.exe or similar
+GeckoSharedLibrary('mozMapi32', msvcrt='static', linkage=None)
+
+SOURCES += [
+    'MapiDll.cpp',
+]
+
+OS_LIBS += [
+    'ole32',
+]
+
+DEFINES['UNICODE'] = True
+DEFINES['_UNICODE'] = True
+
+if not CONFIG['MOZ_INCOMPLETE_EXTERNAL_LINKAGE']:
+    DEFINES['MOZILLA_INTERNAL_API'] = True
+
+DEFFILE	= SRCDIR + '/Mapi32.def'
diff --git a/mailnews/mapi/mapihook/build/Makefile.in b/mailnews/mapi/mapihook/build/Makefile.in
new file mode 100644
index 000000000..0614220e9
--- /dev/null
+++ b/mailnews/mapi/mapihook/build/Makefile.in
@@ -0,0 +1,36 @@
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+MIDL_GENERATED_FILES = msgMapi.h msgMapi_p.c msgMapi_i.c dlldata.c
+
+INSTALL_TARGETS += msgmapi
+msgmapi_FILES := msgMapi.h
+msgmapi_DEST = $(DIST)/include
+msgmapi_TARGET := export
+
+SRCDIR_CSRCS	= $(addprefix $(srcdir)/,$(CSRCS))
+
+GARBAGE	+= $(MIDL_GENERATED_FILES) done_gen $(CSRCS) $(SRCDIR_CSRCS)
+
+EMBED_MANIFEST_AT = 2
+
+CSRCS += \
+  dlldata.c \
+  msgMapi_i.c \
+  msgMapi_p.c \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
+$(MIDL_GENERATED_FILES): done_gen
+
+done_gen: msgMapi.idl
+	$(RM) $(SRCDIR_CSRCS)
+	$(MIDL) $(MIDL_FLAGS) $(UNICODE_FLAGS) $(srcdir)/msgMapi.idl
+	touch $@
+
+export:: done_gen
+
+
diff --git a/mailnews/mapi/mapihook/build/MapiProxy.def b/mailnews/mapi/mapihook/build/MapiProxy.def
new file mode 100644
index 000000000..4da08eb7d
--- /dev/null
+++ b/mailnews/mapi/mapihook/build/MapiProxy.def
@@ -0,0 +1,13 @@
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0. If a copy of the MPL was not distributed with this
+; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+LIBRARY         MapiProxy.dll
+
+EXPORTS
+                DllGetClassObject    PRIVATE
+                DllCanUnloadNow      PRIVATE
+                GetProxyDllInfo      PRIVATE
+                DllRegisterServer    PRIVATE
+                DllUnregisterServer  PRIVATE
+
diff --git a/mailnews/mapi/mapihook/build/module.ver b/mailnews/mapi/mapihook/build/module.ver
new file mode 100644
index 000000000..7691020c2
--- /dev/null
+++ b/mailnews/mapi/mapihook/build/module.ver
@@ -0,0 +1,6 @@
+WIN32_MODULE_FILEVERSION=0,8,0,0
+WIN32_MODULE_FILEVERSION_STRING=0.8
+WIN32_MODULE_COPYRIGHT=ŠThunderbird and Mozilla Developers, according to the MPL 1.1/GPL 2.0/LGPL 2.1 licenses, as applicable.
+WIN32_MODULE_COMPANYNAME=Mozilla.org
+WIN32_MODULE_TRADEMARKS=Mozilla
+WIN32_MODULE_COMMENT=Mozilla Thunderbird Thunderbird MAPI Proxy Dll
diff --git a/mailnews/mapi/mapihook/build/moz.build b/mailnews/mapi/mapihook/build/moz.build
new file mode 100644
index 000000000..5c42875cc
--- /dev/null
+++ b/mailnews/mapi/mapihook/build/moz.build
@@ -0,0 +1,22 @@
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+SharedLibrary('MapiProxy')
+
+OS_LIBS += [
+    'rpcrt4',
+]
+
+for var in ('REGISTER_PROXY_DLL', 'UNICODE', '_UNICODE'):
+    DEFINES[var] = True
+
+# This produces a compile warning mozilla-config.h(145): warning C4005: '_WIN32_WINNT': macro redefinition
+#DEFINES['_WIN32_WINNT'] = '0x400'
+
+if not CONFIG['MOZ_INCOMPLETE_EXTERNAL_LINKAGE']:
+    DEFINES['MOZILLA_INTERNAL_API'] = True
+
+DEFFILE = SRCDIR + '/MapiProxy.def'
+
diff --git a/mailnews/mapi/mapihook/build/msgMapi.idl b/mailnews/mapi/mapihook/build/msgMapi.idl
new file mode 100644
index 000000000..3ca3fd493
--- /dev/null
+++ b/mailnews/mapi/mapihook/build/msgMapi.idl
@@ -0,0 +1,93 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This idl will be compiled by MIDL.  MS-COM is used 
+// as bridge between MAPI clients and the Mozilla.
+
+import "unknwn.idl";
+
+typedef wchar_t LOGIN_PW_TYPE[256];
+
+typedef struct
+{
+    unsigned long     ulReserved;            
+    unsigned long     flFlags;               /* Flags */
+    unsigned long     nPosition_NotUsed;     /* character in text to be replaced by attachment */
+    LPTSTR            lpszPathName;          /* Full path name including file name */
+    LPTSTR            lpszFileName;          /* Real (original) file name */
+    unsigned char *   lpFileType_NotUsed ;
+} nsMapiFileDesc, * lpnsMapiFileDesc;
+
+
+typedef struct
+{
+    unsigned long      ulReserved;           
+    unsigned long      ulRecipClass;  /* MAPI_TO, MAPI_CC, MAPI_BCC, MAPI_ORIG    */
+    LPSTR             lpszName;      /* Recipient name to display */
+    LPSTR             lpszAddress;   /* Recipient email address */
+    unsigned long      ulEIDSize_NotUsed;     
+    unsigned char  *   lpEntryID_NotUsed ;
+} nsMapiRecipDesc, * lpnsMapiRecipDesc;
+
+typedef struct
+{
+    unsigned long    ulReserved;					
+    LPSTR           lpszSubject;  /* Message Subject */
+    LPSTR           lpszNoteText; /* Message Text */
+    LPSTR           lpszMessageType;		
+    LPSTR           lpszDateReceived;	 /* in YYYY/MM/DD HH:MM format */
+    LPSTR           lpszConversationID_NotUsed; /* conversation thread ID */
+    unsigned long    flFlags; /* unread,return receipt */
+    lpnsMapiRecipDesc  lpOriginator;  /* Originator descriptor  */
+    unsigned long      nRecipCount;   /* Number of recipients   */
+    [size_is (nRecipCount)]	lpnsMapiRecipDesc lpRecips;/* Recipient descriptors  */
+    unsigned long      nFileCount;    /* # of file attachments  */
+    [size_is (nFileCount)]	lpnsMapiFileDesc   lpFiles;       /* Attachment descriptors */
+} nsMapiMessage, * lpnsMapiMessage;
+
+[
+    object,
+    uuid(6EDCD38E-8861-11d5-A3DD-00B0D0F3BAA7),
+    helpstring("nsIMapi Inteface"),
+    pointer_default(unique)
+]
+
+interface nsIMapi : IUnknown
+{
+    HRESULT Login([in] unsigned long aUIArg, [in, unique] LOGIN_PW_TYPE aLogin,
+                  [in, unique] LOGIN_PW_TYPE aPassWord, [in] unsigned long aFlags,
+                  [out] unsigned long *aSessionId);
+
+    HRESULT Initialize();
+    HRESULT IsValid();
+    HRESULT IsValidSession([in] unsigned long aSession);
+
+    HRESULT SendMail([in] unsigned long aSession, [in, unique] lpnsMapiMessage aMessage,
+                  [in] short aRecipCount, [in, size_is(aRecipCount)] lpnsMapiRecipDesc aRecips, 
+                  [in] short aFileCount, [in, size_is(aFileCount)] lpnsMapiFileDesc aFiles, 
+                  [in] unsigned long aFlags, [in] unsigned long aReserved) ;
+
+    HRESULT SendDocuments( [in] unsigned long aSession, 
+                  [in, unique] LPTSTR aDelimChar, [in, unique] LPTSTR aFilePaths,
+                  [in, unique] LPTSTR aFileNames, [in] ULONG aFlags ) ;
+
+    HRESULT FindNext(  [in] unsigned long aSession, [in] ULONG ulUIParam, [in, unique] LPTSTR lpszMessageType,
+                              [in, unique] LPTSTR lpszSeedMessageID, [in] ULONG flFlags, [in] ULONG ulReserved,
+                              [in] [out] char lpszMessageID[64] ) ;
+
+    HRESULT ReadMail( [in] unsigned long lhSession, [in] ULONG ulUIParam, [in, unique] LPTSTR lpszMessageID,
+                              [in] ULONG flFlags, [in] ULONG ulReserved, [out] lpnsMapiMessage *lppMessage);
+
+    HRESULT DeleteMail( [in] unsigned long lhSession, [in] ULONG ulUIParam, [in, unique] LPTSTR lpszMessageID,
+                              [in] ULONG flFlags, [in] ULONG ulReserved);
+
+    HRESULT SaveMail( [in] unsigned long lhSession, [in] ULONG ulUIParam, [in, unique] lpnsMapiMessage lppMessage,
+                      [in] ULONG flFlags, [in] ULONG ulReserved, [in, unique] LPTSTR lpszMessageID);
+
+    HRESULT Logoff (unsigned long aSession);
+    HRESULT CleanUp();
+};
+
+
+
diff --git a/mailnews/mapi/mapihook/moz.build b/mailnews/mapi/mapihook/moz.build
new file mode 100644
index 000000000..65ca38934
--- /dev/null
+++ b/mailnews/mapi/mapihook/moz.build
@@ -0,0 +1,11 @@
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+DIRS += [
+    'public',
+    'build',
+    'src',
+]
+
diff --git a/mailnews/mapi/mapihook/public/moz.build b/mailnews/mapi/mapihook/public/moz.build
new file mode 100644
index 000000000..a2d2b2ef9
--- /dev/null
+++ b/mailnews/mapi/mapihook/public/moz.build
@@ -0,0 +1,11 @@
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+XPIDL_SOURCES += [
+    'nsIMapiSupport.idl',
+]
+
+XPIDL_MODULE = 'mapihook'
+
diff --git a/mailnews/mapi/mapihook/public/nsIMapiSupport.idl b/mailnews/mapi/mapihook/public/nsIMapiSupport.idl
new file mode 100644
index 000000000..e160566a4
--- /dev/null
+++ b/mailnews/mapi/mapihook/public/nsIMapiSupport.idl
@@ -0,0 +1,44 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+/**
+ * This interface provides support for registering Mozilla as a COM component
+ * for extending the use of Mail/News through Simple MAPI.
+ * 
+ */
+
+[noscript, uuid(2907B676-C4BD-49af-880A-E27A0616291E)]
+interface nsIMapiSupport : nsISupports {
+
+   /** Initiates MAPI support
+    */
+
+   void initializeMAPISupport();
+
+   /**  Shuts down the MAPI support
+    */
+
+   void shutdownMAPISupport();
+
+   /**  registerServer - register the mapi DLL with the desktop
+    *   Typically called by the window shell service when we are
+    *   made the default mail app
+    */
+   void registerServer();
+   
+   /**  unRegisterServer - unregister the mapi DLL with the desktop
+    *   Typically called by the window shell service when we are
+    *   removed as the default mail app.
+    */   
+   void unRegisterServer();
+};
+
+%{C++
+#define NS_IMAPISUPPORT_CONTRACTID    "@mozilla.org/mapisupport;1"
+#define NS_IMAPISUPPORT_CLASSNAME     "Mozilla MAPI Support"
+%}
+
+
diff --git a/mailnews/mapi/mapihook/src/Makefile.in b/mailnews/mapi/mapihook/src/Makefile.in
new file mode 100644
index 000000000..10e6172bf
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/Makefile.in
@@ -0,0 +1,6 @@
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+CSRCS += ../build/msgMapi_i.c
diff --git a/mailnews/mapi/mapihook/src/Registry.cpp b/mailnews/mapi/mapihook/src/Registry.cpp
new file mode 100644
index 000000000..31db7520b
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/Registry.cpp
@@ -0,0 +1,291 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#undef _UNICODE
+#undef UNICODE
+
+#include <objbase.h>
+#include "nsStringGlue.h"
+#include "Registry.h"
+
+#define MAPI_PROXY_DLL_NAME   "MapiProxy.dll"
+#define MAPI_STARTUP_ARG      " /MAPIStartUp"
+#define MAX_SIZE              2048
+
+// Size of a CLSID as a string
+const int CLSID_STRING_SIZE = 39;
+
+// Proxy/Stub Dll Routines
+
+typedef HRESULT (__stdcall ProxyServer)();
+
+
+// Convert a CLSID to a char string.
+
+BOOL CLSIDtochar(const CLSID& clsid, char* szCLSID,
+                 int length)
+{
+    LPOLESTR wszCLSID = NULL;
+
+    // Get CLSID
+    HRESULT hr = StringFromCLSID(clsid, &wszCLSID);
+    if (FAILED(hr))
+        return FALSE;
+
+    // Covert from wide characters to non-wide.
+    wcstombs(szCLSID, wszCLSID, length);
+
+    // Free memory.
+    CoTaskMemFree(wszCLSID);
+
+    return TRUE;
+}
+
+// Create a key and set its value.
+
+BOOL setKeyAndValue(nsAutoCString keyName, const char* subKey,
+                    const char* theValue)
+{
+    HKEY hKey;
+    BOOL retValue = TRUE;
+
+    nsAutoCString theKey(keyName);
+    if (subKey != NULL)
+    {
+        theKey += "\\";
+        theKey += subKey;
+    }
+
+    // Create and open key and subkey.
+    long lResult = RegCreateKeyEx(HKEY_CLASSES_ROOT, theKey.get(), 
+                                  0, NULL, REG_OPTION_NON_VOLATILE,
+                                  KEY_ALL_ACCESS, NULL, &hKey, NULL);
+    if (lResult != ERROR_SUCCESS)
+        return FALSE ;
+
+    // Set the Value.
+    if (theValue != NULL)
+    {
+       lResult = RegSetValueEx(hKey, NULL, 0, REG_SZ, (BYTE *)theValue, 
+                      strlen(theValue)+1);
+       if (lResult != ERROR_SUCCESS)
+           retValue = FALSE;
+    }
+
+    RegCloseKey(hKey);
+    return TRUE;
+}
+
+// Delete a key and all of its descendents.
+
+LONG recursiveDeleteKey(HKEY hKeyParent,           // Parent of key to delete
+                        const char* lpszKeyChild)  // Key to delete
+{
+    // Open the child.
+    HKEY hKeyChild ;
+    LONG lRes = RegOpenKeyEx(hKeyParent, lpszKeyChild, 0,
+                             KEY_ALL_ACCESS, &hKeyChild) ;
+    if (lRes != ERROR_SUCCESS)
+    {
+        return lRes ;
+    }
+
+    // Enumerate all of the decendents of this child.
+    FILETIME time ;
+    char szBuffer[MAX_SIZE] ;
+    DWORD dwSize = MAX_SIZE ;
+    while (RegEnumKeyEx(hKeyChild, 0, szBuffer, &dwSize, NULL,
+                        NULL, NULL, &time) == S_OK)
+    {
+        // Delete the decendents of this child.
+        lRes = recursiveDeleteKey(hKeyChild, szBuffer) ;
+        if (lRes != ERROR_SUCCESS)
+        {
+            // Cleanup before exiting.
+            RegCloseKey(hKeyChild) ;
+            return lRes;
+        }
+        dwSize = MAX_SIZE;
+    }
+
+    // Close the child.
+    RegCloseKey(hKeyChild) ;
+
+    // Delete this child.
+    return RegDeleteKey(hKeyParent, lpszKeyChild) ;
+}
+
+void RegisterProxy()
+{
+    HINSTANCE h = NULL;
+    ProxyServer *RegisterFunc = NULL;
+
+    char szModule[MAX_SIZE];
+    char *pTemp = NULL;
+
+    HMODULE hModule = GetModuleHandle(NULL);
+    DWORD dwResult  = ::GetModuleFileName(hModule, szModule,
+                                          sizeof(szModule)/sizeof(char));
+    if (dwResult == 0)
+        return;
+
+    pTemp = strrchr(szModule, '\\');
+    if (pTemp == NULL)
+        return;
+
+    *pTemp = '\0';
+    nsAutoCString proxyPath(szModule);
+
+    proxyPath += "\\";
+    proxyPath += MAPI_PROXY_DLL_NAME;
+
+    h = LoadLibrary(proxyPath.get());
+    if (h == NULL)
+        return;
+
+    RegisterFunc = (ProxyServer *) GetProcAddress(h, "DllRegisterServer");
+    if (RegisterFunc)
+        RegisterFunc();
+
+    FreeLibrary(h);
+}
+
+void UnRegisterProxy()
+{
+    HINSTANCE h = NULL;
+    ProxyServer *UnRegisterFunc = NULL;
+
+    char szModule[MAX_SIZE];
+    char *pTemp = NULL;
+
+    HMODULE hModule = GetModuleHandle(NULL);
+    DWORD dwResult  = ::GetModuleFileName(hModule, szModule,
+                                          sizeof(szModule)/sizeof(char));
+    if (dwResult == 0)
+        return;
+
+    pTemp = strrchr(szModule, '\\');
+    if (pTemp == NULL)
+        return;
+
+    *pTemp = '\0';
+    nsAutoCString proxyPath(szModule);
+
+    proxyPath += "\\";
+    proxyPath += MAPI_PROXY_DLL_NAME;
+
+    h = LoadLibrary(proxyPath.get());
+    if (h == NULL)
+        return;
+
+    UnRegisterFunc = (ProxyServer *) GetProcAddress(h, "DllUnregisterServer");
+    if (UnRegisterFunc)
+        UnRegisterFunc();
+
+    FreeLibrary(h);
+}
+
+// Register the component in the registry.
+
+HRESULT RegisterServer(const CLSID& clsid,         // Class ID
+                       const char* szFriendlyName, // Friendly Name
+                       const char* szVerIndProgID, // Programmatic
+                       const char* szProgID)       //   IDs
+{
+    HMODULE hModule = GetModuleHandle(NULL);
+    char szModuleName[MAX_SIZE];
+    char szCLSID[CLSID_STRING_SIZE];
+
+    nsAutoCString independentProgId(szVerIndProgID);
+    nsAutoCString progId(szProgID);
+
+    DWORD dwResult = ::GetModuleFileName(hModule, szModuleName,
+                              sizeof(szModuleName)/sizeof(char));
+
+    if (dwResult == 0)
+        return S_FALSE;
+
+    nsAutoCString moduleName(szModuleName);
+    nsAutoCString registryKey("CLSID\\");
+
+    moduleName += MAPI_STARTUP_ARG;
+
+    // Convert the CLSID into a char.
+
+    if (!CLSIDtochar(clsid, szCLSID, sizeof(szCLSID)))
+        return S_FALSE;
+    registryKey += szCLSID;
+
+    // Add the CLSID to the registry.
+    if (!setKeyAndValue(registryKey, NULL, szFriendlyName))
+        return S_FALSE;
+
+    if (!setKeyAndValue(registryKey, "LocalServer32", moduleName.get()))
+        return S_FALSE;
+
+    // Add the ProgID subkey under the CLSID key.
+    if (!setKeyAndValue(registryKey, "ProgID", szProgID))
+        return S_FALSE;
+
+    // Add the version-independent ProgID subkey under CLSID key.
+    if (!setKeyAndValue(registryKey, "VersionIndependentProgID", szVerIndProgID))
+        return S_FALSE;
+
+    // Add the version-independent ProgID subkey under HKEY_CLASSES_ROOT.
+    if (!setKeyAndValue(independentProgId, NULL, szFriendlyName))
+        return S_FALSE; 
+    if (!setKeyAndValue(independentProgId, "CLSID", szCLSID))
+        return S_FALSE;
+    if (!setKeyAndValue(independentProgId, "CurVer", szProgID))
+        return S_FALSE;
+
+    // Add the versioned ProgID subkey under HKEY_CLASSES_ROOT.
+    if (!setKeyAndValue(progId, NULL, szFriendlyName))
+        return S_FALSE; 
+    if (!setKeyAndValue(progId, "CLSID", szCLSID))
+        return S_FALSE;
+
+    RegisterProxy();
+
+    return S_OK;
+}
+
+LONG UnregisterServer(const CLSID& clsid,         // Class ID
+                      const char* szVerIndProgID, // Programmatic
+                      const char* szProgID)       //   IDs
+{
+    LONG lResult = S_OK;
+
+    // Convert the CLSID into a char.
+
+    char szCLSID[CLSID_STRING_SIZE];
+    if (!CLSIDtochar(clsid, szCLSID, sizeof(szCLSID)))
+        return S_FALSE;
+
+    UnRegisterProxy();
+
+    nsAutoCString registryKey("CLSID\\");
+    registryKey += szCLSID;
+
+    lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, registryKey.get());
+    if (lResult == ERROR_SUCCESS || lResult == ERROR_FILE_NOT_FOUND)
+        return lResult;
+
+    registryKey += "\\LocalServer32";
+
+    // Delete only the path for this server.
+
+    lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, registryKey.get());
+    if (lResult != ERROR_SUCCESS && lResult != ERROR_FILE_NOT_FOUND)
+        return lResult;
+
+    // Delete the version-independent ProgID Key.
+    lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, szVerIndProgID);
+    if (lResult != ERROR_SUCCESS && lResult != ERROR_FILE_NOT_FOUND)
+        return lResult;
+
+    lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, szProgID);
+
+    return lResult;
+}
diff --git a/mailnews/mapi/mapihook/src/Registry.h b/mailnews/mapi/mapihook/src/Registry.h
new file mode 100644
index 000000000..34a4efca7
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/Registry.h
@@ -0,0 +1,23 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _REGISTRY_H_
+#define _REGISTRY_H_
+
+#include <objbase.h>
+
+// This function will register a component in the Registry.
+
+HRESULT RegisterServer(const CLSID& clsid, 
+                       const char* szFriendlyName,
+                       const char* szVerIndProgID,
+                       const char* szProgID) ;
+
+// This function will unregister a component.
+
+HRESULT UnregisterServer(const CLSID& clsid,
+                         const char* szVerIndProgID,
+                         const char* szProgID) ;
+
+#endif
diff --git a/mailnews/mapi/mapihook/src/moz.build b/mailnews/mapi/mapihook/src/moz.build
new file mode 100644
index 000000000..3e8cd3450
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/moz.build
@@ -0,0 +1,25 @@
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+SOURCES += [
+    'msgMapiFactory.cpp',
+    'msgMapiHook.cpp',
+    'msgMapiImp.cpp',
+    'msgMapiMain.cpp',
+    'msgMapiSupport.cpp',
+    'Registry.cpp',
+]
+
+if CONFIG['MOZ_INCOMPLETE_EXTERNAL_LINKAGE']:
+    XPCOMBinaryComponent('msgMapi')
+else:
+    FINAL_LIBRARY = 'xul'
+
+OS_LIBS += [
+    'ole32',
+]
+
+DEFINES['UNICODE'] = True
+DEFINES['_UNICODE'] = True
diff --git a/mailnews/mapi/mapihook/src/msgMapiFactory.cpp b/mailnews/mapi/mapihook/src/msgMapiFactory.cpp
new file mode 100644
index 000000000..829279f62
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiFactory.cpp
@@ -0,0 +1,85 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#undef UNICODE
+#undef _UNICODE
+
+#include "msgMapiFactory.h"
+#include "msgMapiImp.h"
+#include "msgMapi.h"
+
+CMapiFactory ::CMapiFactory()
+: m_cRef(1)
+{
+}
+
+CMapiFactory::~CMapiFactory()
+{
+}
+
+STDMETHODIMP CMapiFactory::QueryInterface(const IID& aIid, void** aPpv)
+{    
+    if ((aIid == IID_IUnknown) || (aIid == IID_IClassFactory))
+    {
+        *aPpv = static_cast<IClassFactory*>(this); 
+    }
+    else
+    {
+        *aPpv = nullptr;
+        return E_NOINTERFACE;
+    }
+    reinterpret_cast<IUnknown*>(*aPpv)->AddRef();
+    return S_OK;
+}
+
+STDMETHODIMP_(ULONG) CMapiFactory::AddRef()
+{
+    return ++m_cRef;
+}
+
+STDMETHODIMP_(ULONG) CMapiFactory::Release() 
+{
+    int32_t temp = --m_cRef;
+    if (m_cRef == 0)
+    {
+        delete this;
+        return 0;
+    }
+
+    return temp;
+}
+
+STDMETHODIMP CMapiFactory::CreateInstance(IUnknown* aUnknownOuter,
+                                           const IID& aIid,
+                                           void** aPpv) 
+{
+    // Cannot aggregate.
+
+    if (aUnknownOuter != nullptr)
+    {
+        return CLASS_E_NOAGGREGATION ;
+    }
+
+    // Create component.
+
+    CMapiImp* pImp = new CMapiImp();
+    if (pImp == nullptr)
+    {
+        return E_OUTOFMEMORY ;
+    }
+
+    // Get the requested interface.
+    HRESULT hr = pImp->QueryInterface(aIid, aPpv);
+
+    // Release the IUnknown pointer.
+    // (If QueryInterface failed, component will delete itself.)
+
+    pImp->Release();
+    return hr;
+}
+
+STDMETHODIMP CMapiFactory::LockServer(BOOL aLock) 
+{
+    return S_OK ;
+}
diff --git a/mailnews/mapi/mapihook/src/msgMapiFactory.h b/mailnews/mapi/mapihook/src/msgMapiFactory.h
new file mode 100644
index 000000000..7ae2f2ed3
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiFactory.h
@@ -0,0 +1,39 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MSG_MAPI_FACTORY_H
+#define MSG_MAPI_FACTORY_H
+
+#include <windows.h>
+#include <objbase.h>
+#include "nspr.h"
+#include "nsISupportsImpl.h" // ThreadSafeAutoRefCnt
+#include <stdint.h>
+
+
+class CMapiFactory : public IClassFactory
+{
+public :
+
+    // IUnknown
+
+    STDMETHODIMP            QueryInterface (REFIID aIid, void** aPpv);
+    STDMETHODIMP_(ULONG)    AddRef(void);
+    STDMETHODIMP_(ULONG)    Release(void);
+
+    // IClassFactory
+
+    STDMETHODIMP        CreateInstance (LPUNKNOWN aUnkOuter, REFIID aIid, void **aPpv);
+    STDMETHODIMP        LockServer (BOOL aLock);
+
+    CMapiFactory ();
+
+private:
+    mozilla::ThreadSafeAutoRefCnt m_cRef;
+
+    ~CMapiFactory ();
+};
+
+#endif  // MSG_MAPI_FACTORY_H
+
diff --git a/mailnews/mapi/mapihook/src/msgMapiHook.cpp b/mailnews/mapi/mapihook/src/msgMapiHook.cpp
new file mode 100644
index 000000000..02696fe94
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiHook.cpp
@@ -0,0 +1,829 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#define MAPI_STARTUP_ARG       "/MAPIStartUp"
+
+#include <mapidefs.h>
+#include <mapi.h>
+#include <tchar.h>
+#include <direct.h>
+#include "nsCOMPtr.h"
+#include "nsIComponentManager.h"
+#include "nsIServiceManager.h"
+#include "nsISupports.h"
+#include "nsIPromptService.h"
+#include "nsIAppStartup.h"
+#include "nsIAppShellService.h"
+#include "mozIDOMWindow.h"
+#include "nsINativeAppSupport.h"
+#include "nsIMsgAccountManager.h"
+#include "nsMsgBaseCID.h"
+#include "nsIStringBundle.h"
+#include "nsIPrefService.h"
+#include "nsIPrefBranch.h"
+#include "nsStringGlue.h"
+#include "nsUnicharUtils.h"
+#include "nsIMsgAttachment.h"
+#include "nsIMsgCompFields.h"
+#include "nsIMsgComposeParams.h"
+#include "nsIMsgCompose.h"
+#include "nsMsgCompCID.h"
+#include "nsIMsgSend.h"
+#include "nsIMsgComposeService.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsIDirectoryService.h"
+#include "nsMsgI18N.h"
+#include "msgMapi.h"
+#include "msgMapiHook.h"
+#include "msgMapiSupport.h"
+#include "msgMapiMain.h"
+#include "nsThreadUtils.h"
+#include "nsMsgUtils.h"
+#include "nsNetUtil.h"
+#include "mozilla/Services.h"
+#include "nsIArray.h"
+#include "nsArrayUtils.h"
+#include "nsEmbedCID.h"
+#include "mozilla/Logging.h"
+
+extern PRLogModuleInfo *MAPI;
+
+class nsMAPISendListener : public nsIMsgSendListener
+{
+public:
+
+    // nsISupports interface
+    NS_DECL_THREADSAFE_ISUPPORTS
+
+    /* void OnStartSending (in string aMsgID, in uint32_t aMsgSize); */
+    NS_IMETHOD OnStartSending(const char *aMsgID, uint32_t aMsgSize) { return NS_OK; }
+
+    /* void OnProgress (in string aMsgID, in uint32_t aProgress, in uint32_t aProgressMax); */
+    NS_IMETHOD OnProgress(const char *aMsgID, uint32_t aProgress, uint32_t aProgressMax) { return NS_OK;}
+
+    /* void OnStatus (in string aMsgID, in wstring aMsg); */
+    NS_IMETHOD OnStatus(const char *aMsgID, const char16_t *aMsg) { return NS_OK;}
+
+    /* void OnStopSending (in string aMsgID, in nsresult aStatus, in wstring aMsg, in nsIFile returnFile); */
+    NS_IMETHOD OnStopSending(const char *aMsgID, nsresult aStatus, const char16_t *aMsg,
+                           nsIFile *returnFile) {
+        PR_CEnterMonitor(this);
+        PR_CNotifyAll(this);
+        m_done = true;
+        PR_CExitMonitor(this);
+        return NS_OK ;
+    }
+
+	/* void OnSendNotPerformed */
+	NS_IMETHOD OnSendNotPerformed(const char *aMsgID, nsresult aStatus)
+	{
+		return OnStopSending(aMsgID, aStatus, nullptr, nullptr) ;
+	}
+
+    /* void OnGetDraftFolderURI (); */
+    NS_IMETHOD OnGetDraftFolderURI(const char *aFolderURI) {return NS_OK;}
+
+    static nsresult CreateMAPISendListener( nsIMsgSendListener **ppListener);
+
+    bool IsDone() { return m_done ; }
+
+protected :
+    nsMAPISendListener() {
+        m_done = false;
+    }
+
+    bool            m_done;
+private:
+    virtual ~nsMAPISendListener() { }
+
+};
+
+
+NS_IMPL_ISUPPORTS(nsMAPISendListener, nsIMsgSendListener)
+
+nsresult nsMAPISendListener::CreateMAPISendListener( nsIMsgSendListener **ppListener)
+{
+    NS_ENSURE_ARG_POINTER(ppListener) ;
+
+    *ppListener = new nsMAPISendListener();
+    if (! *ppListener)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    NS_ADDREF(*ppListener);
+    return NS_OK;
+}
+
+bool nsMapiHook::isMapiService = false;
+
+void nsMapiHook::CleanUp()
+{
+    // This routine will be fully implemented in future
+    // to cleanup mapi related stuff inside mozilla code.
+}
+
+bool nsMapiHook::DisplayLoginDialog(bool aLogin, char16_t **aUsername,
+                      char16_t **aPassword)
+{
+  nsresult rv;
+  bool btnResult = false;
+
+  nsCOMPtr<nsIPromptService> dlgService(do_GetService(NS_PROMPTSERVICE_CONTRACTID, &rv));
+  if (NS_SUCCEEDED(rv) && dlgService)
+  {
+    nsCOMPtr<nsIStringBundleService> bundleService =
+      mozilla::services::GetStringBundleService();
+    if (!bundleService) return false;
+
+    nsCOMPtr<nsIStringBundle> bundle;
+    rv = bundleService->CreateBundle(MAPI_PROPERTIES_CHROME, getter_AddRefs(bundle));
+    if (NS_FAILED(rv) || !bundle) return false;
+
+    nsCOMPtr<nsIStringBundle> brandBundle;
+    rv = bundleService->CreateBundle(
+                    "chrome://branding/locale/brand.properties",
+                    getter_AddRefs(brandBundle));
+    if (NS_FAILED(rv)) return false;
+
+    nsString brandName;
+    rv = brandBundle->GetStringFromName(
+                       u"brandFullName",
+                       getter_Copies(brandName));
+    if (NS_FAILED(rv)) return false;
+
+    nsString loginTitle;
+    const char16_t *brandStrings[] = { brandName.get() };
+    NS_NAMED_LITERAL_STRING(loginTitlePropertyTag, "loginTitle");
+    const char16_t *dTitlePropertyTag = loginTitlePropertyTag.get();
+    rv = bundle->FormatStringFromName(dTitlePropertyTag, brandStrings, 1,
+                                      getter_Copies(loginTitle));
+    if (NS_FAILED(rv)) return false;
+
+    if (aLogin)
+    {
+      nsString loginText;
+      rv = bundle->GetStringFromName(u"loginTextwithName",
+                                     getter_Copies(loginText));
+      if (NS_FAILED(rv) || loginText.IsEmpty()) return false;
+
+      bool dummyValue = false;
+      rv = dlgService->PromptUsernameAndPassword(nullptr, loginTitle.get(),
+                                                 loginText.get(), aUsername, aPassword,
+                                                 nullptr, &dummyValue, &btnResult);
+    }
+    else
+    {
+      //nsString loginString;
+      nsString loginText;
+      const char16_t *userNameStrings[] = { *aUsername };
+
+      NS_NAMED_LITERAL_STRING(loginTextPropertyTag, "loginText");
+      const char16_t *dpropertyTag = loginTextPropertyTag.get();
+      rv = bundle->FormatStringFromName(dpropertyTag, userNameStrings, 1,
+                                        getter_Copies(loginText));
+      if (NS_FAILED(rv)) return false;
+
+      bool dummyValue = false;
+      rv = dlgService->PromptPassword(nullptr, loginTitle.get(), loginText.get(),
+                                      aPassword, nullptr, &dummyValue, &btnResult);
+    }
+  }
+
+  return btnResult;
+}
+
+bool nsMapiHook::VerifyUserName(const nsString& aUsername, nsCString& aIdKey)
+{
+  nsresult rv;
+
+  if (aUsername.IsEmpty())
+    return false;
+
+  nsCOMPtr<nsIMsgAccountManager> accountManager(do_GetService(NS_MSGACCOUNTMANAGER_CONTRACTID, &rv));
+  if (NS_FAILED(rv)) return false;
+  nsCOMPtr<nsIArray> identities;
+  rv = accountManager->GetAllIdentities(getter_AddRefs(identities));
+  if (NS_FAILED(rv)) return false;
+
+  uint32_t numIndentities = 0;
+  identities->GetLength(&numIndentities);
+
+  for (uint32_t i = 0; i < numIndentities; i++)
+  {
+    nsCOMPtr<nsIMsgIdentity> thisIdentity(do_QueryElementAt(identities, i, &rv));
+    if (NS_SUCCEEDED(rv) && thisIdentity)
+    {
+      nsCString email;
+      rv = thisIdentity->GetEmail(email);
+      if (NS_FAILED(rv)) continue;
+
+      // get the username from the email and compare with the username
+      int32_t index = email.FindChar('@');
+      if (index != -1)
+        email.SetLength(index);
+
+      if (aUsername.Equals(NS_ConvertASCIItoUTF16(email)))
+        return NS_SUCCEEDED(thisIdentity->GetKey(aIdKey));
+    }
+  }
+
+  return false;
+}
+
+bool
+nsMapiHook::IsBlindSendAllowed()
+{
+  bool enabled = false;
+  bool warn = true;
+  nsCOMPtr<nsIPrefBranch> prefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID);
+  if (prefBranch) {
+      prefBranch->GetBoolPref(PREF_MAPI_WARN_PRIOR_TO_BLIND_SEND, &warn);
+      prefBranch->GetBoolPref(PREF_MAPI_BLIND_SEND_ENABLED, &enabled);
+  }
+  if (!enabled)
+      return false;
+
+  if (!warn)
+      return true; // Everything is okay.
+
+  nsresult rv;
+  nsCOMPtr<nsIStringBundleService> bundleService =
+    mozilla::services::GetStringBundleService();
+  if (!bundleService) return false;
+
+  nsCOMPtr<nsIStringBundle> bundle;
+  rv = bundleService->CreateBundle(MAPI_PROPERTIES_CHROME, getter_AddRefs(bundle));
+  if (NS_FAILED(rv) || !bundle) return false;
+
+  nsString warningMsg;
+  rv = bundle->GetStringFromName(u"mapiBlindSendWarning",
+                                      getter_Copies(warningMsg));
+  if (NS_FAILED(rv)) return false;
+
+  nsString dontShowAgainMessage;
+  rv = bundle->GetStringFromName(u"mapiBlindSendDontShowAgain",
+                                      getter_Copies(dontShowAgainMessage));
+  if (NS_FAILED(rv)) return false;
+
+  nsCOMPtr<nsIPromptService> dlgService(do_GetService(NS_PROMPTSERVICE_CONTRACTID, &rv));
+  if (NS_FAILED(rv) || !dlgService) return false;
+
+  bool continueToWarn = true;
+  bool okayToContinue = false;
+  dlgService->ConfirmCheck(nullptr, nullptr, warningMsg.get(), dontShowAgainMessage.get(), &continueToWarn, &okayToContinue);
+
+  if (!continueToWarn && okayToContinue && prefBranch)
+    prefBranch->SetBoolPref(PREF_MAPI_WARN_PRIOR_TO_BLIND_SEND, false);
+
+  return okayToContinue;
+}
+
+// this is used for Send without UI
+nsresult nsMapiHook::BlindSendMail (unsigned long aSession, nsIMsgCompFields * aCompFields)
+{
+  nsresult rv = NS_OK ;
+
+  if (!IsBlindSendAllowed())
+    return NS_ERROR_FAILURE;
+
+  /** create nsIMsgComposeParams obj and other fields to populate it **/
+
+  nsCOMPtr<mozIDOMWindowProxy> hiddenWindow;
+  // get parent window
+  nsCOMPtr<nsIAppShellService> appService = do_GetService( "@mozilla.org/appshell/appShellService;1", &rv);
+  if (NS_FAILED(rv)|| (!appService) ) return rv ;
+
+  rv = appService->GetHiddenDOMWindow(getter_AddRefs(hiddenWindow));
+  if ( NS_FAILED(rv) ) return rv ;
+  // smtp password and Logged in used IdKey from MapiConfig (session obj)
+  nsMAPIConfiguration * pMapiConfig = nsMAPIConfiguration::GetMAPIConfiguration() ;
+  if (!pMapiConfig) return NS_ERROR_FAILURE ;  // get the singelton obj
+  char16_t * password = pMapiConfig->GetPassword(aSession) ;
+  // password
+  nsAutoCString smtpPassword;
+  LossyCopyUTF16toASCII(password, smtpPassword);
+
+  // Id key
+  nsCString MsgIdKey;
+  pMapiConfig->GetIdKey(aSession, MsgIdKey);
+
+  // get the MsgIdentity for the above key using AccountManager
+  nsCOMPtr <nsIMsgAccountManager> accountManager = do_GetService (NS_MSGACCOUNTMANAGER_CONTRACTID) ;
+  if (NS_FAILED(rv) || (!accountManager) ) return rv ;
+
+  nsCOMPtr <nsIMsgIdentity> pMsgId ;
+  rv = accountManager->GetIdentity (MsgIdKey, getter_AddRefs(pMsgId)) ;
+  if (NS_FAILED(rv) ) return rv ;
+
+  // create a send listener to get back the send status
+  nsCOMPtr <nsIMsgSendListener> sendListener ;
+  rv = nsMAPISendListener::CreateMAPISendListener(getter_AddRefs(sendListener)) ;
+  if (NS_FAILED(rv) || (!sendListener) ) return rv;
+
+  // create the compose params object
+  nsCOMPtr<nsIMsgComposeParams> pMsgComposeParams (do_CreateInstance(NS_MSGCOMPOSEPARAMS_CONTRACTID, &rv));
+  if (NS_FAILED(rv) || (!pMsgComposeParams) ) return rv ;
+
+  // populate the compose params
+  bool forcePlainText;
+  aCompFields->GetForcePlainText(&forcePlainText);
+  pMsgComposeParams->SetType(nsIMsgCompType::New);
+  pMsgComposeParams->SetFormat(forcePlainText ? nsIMsgCompFormat::PlainText : nsIMsgCompFormat::HTML);
+  pMsgComposeParams->SetIdentity(pMsgId);
+  pMsgComposeParams->SetComposeFields(aCompFields);
+  pMsgComposeParams->SetSendListener(sendListener) ;
+  pMsgComposeParams->SetSmtpPassword(smtpPassword.get());
+
+  // create the nsIMsgCompose object to send the object
+  nsCOMPtr<nsIMsgCompose> pMsgCompose (do_CreateInstance(NS_MSGCOMPOSE_CONTRACTID, &rv));
+  if (NS_FAILED(rv) || (!pMsgCompose) ) return rv ;
+
+  /** initialize nsIMsgCompose, Send the message, wait for send completion response **/
+
+  rv = pMsgCompose->Initialize(pMsgComposeParams, hiddenWindow, nullptr);
+  if (NS_FAILED(rv)) return rv ;
+
+  // If we're in offline mode, we'll need to queue it for later. No point in trying to send it.
+  return pMsgCompose->SendMsg(WeAreOffline() ? nsIMsgSend::nsMsgQueueForLater : nsIMsgSend::nsMsgDeliverNow,
+			      pMsgId, nullptr, nullptr, nullptr);
+  if (NS_FAILED(rv)) return rv ;
+
+  // assign to interface pointer from nsCOMPtr to facilitate typecast below
+  nsIMsgSendListener * pSendListener = sendListener ;
+
+  // we need to wait here to make sure that we return only after send is completed
+  // so we will have a event loop here which will process the events till the Send IsDone.
+  nsCOMPtr<nsIThread> thread(do_GetCurrentThread());
+  while ( !((nsMAPISendListener *) pSendListener)->IsDone() )
+  {
+    PR_CEnterMonitor(pSendListener);
+    PR_CWait(pSendListener, PR_MicrosecondsToInterval(1000UL));
+    PR_CExitMonitor(pSendListener);
+    NS_ProcessPendingEvents(thread);
+  }
+
+  return rv ;
+}
+
+// this is used to populate comp fields with Unicode data
+nsresult nsMapiHook::PopulateCompFields(lpnsMapiMessage aMessage,
+                                    nsIMsgCompFields * aCompFields)
+{
+  nsresult rv = NS_OK ;
+
+  if (aMessage->lpOriginator)
+    aCompFields->SetFrom (NS_ConvertASCIItoUTF16((char *) aMessage->lpOriginator->lpszAddress));
+
+  nsAutoString To ;
+  nsAutoString Cc ;
+  nsAutoString Bcc ;
+
+  NS_NAMED_LITERAL_STRING(Comma, ",");
+
+  if (aMessage->lpRecips)
+  {
+    for (int i=0 ; i < (int) aMessage->nRecipCount ; i++)
+    {
+      if (aMessage->lpRecips[i].lpszAddress || aMessage->lpRecips[i].lpszName)
+      {
+        const char *addressWithoutType = (aMessage->lpRecips[i].lpszAddress)
+          ? aMessage->lpRecips[i].lpszAddress : aMessage->lpRecips[i].lpszName;
+        if (!PL_strncasecmp(addressWithoutType, "SMTP:", 5))
+          addressWithoutType += 5;
+        switch (aMessage->lpRecips[i].ulRecipClass)
+        {
+        case MAPI_TO :
+          if (!To.IsEmpty())
+            To += Comma;
+          To.Append(NS_ConvertASCIItoUTF16(addressWithoutType));
+          break;
+
+        case MAPI_CC :
+          if (!Cc.IsEmpty())
+            Cc += Comma;
+          Cc.Append(NS_ConvertASCIItoUTF16(addressWithoutType));
+          break;
+
+        case MAPI_BCC :
+          if (!Bcc.IsEmpty())
+            Bcc += Comma;
+          Bcc.Append(NS_ConvertASCIItoUTF16(addressWithoutType));
+          break;
+        }
+      }
+    }
+  }
+
+  MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("to: %s cc: %s bcc: %s \n", NS_ConvertUTF16toUTF8(To).get(), NS_ConvertUTF16toUTF8(Cc).get(), NS_ConvertUTF16toUTF8(Bcc).get()));
+  // set To, Cc, Bcc
+  aCompFields->SetTo (To) ;
+  aCompFields->SetCc (Cc) ;
+  aCompFields->SetBcc (Bcc) ;
+
+  // set subject
+  if (aMessage->lpszSubject)
+    aCompFields->SetSubject(NS_ConvertASCIItoUTF16(aMessage->lpszSubject));
+
+  // handle attachments as File URL
+  rv = HandleAttachments (aCompFields, aMessage->nFileCount, aMessage->lpFiles, true) ;
+  if (NS_FAILED(rv)) return rv ;
+
+  // set body
+  if (aMessage->lpszNoteText)
+  {
+      nsString Body;
+      CopyASCIItoUTF16(aMessage->lpszNoteText, Body);
+      if (Body.IsEmpty() || Body.Last() != '\n')
+        Body.AppendLiteral(CRLF);
+
+      // This is needed when Simple MAPI is used without a compose window.
+      // See bug 1366196.
+      if (Body.Find("<html>") == kNotFound)
+        aCompFields->SetForcePlainText(true);
+
+      rv = aCompFields->SetBody(Body) ;
+  }
+  return rv ;
+}
+
+nsresult nsMapiHook::HandleAttachments (nsIMsgCompFields * aCompFields, int32_t aFileCount,
+                                        lpnsMapiFileDesc aFiles, BOOL aIsUnicode)
+{
+    nsresult rv = NS_OK ;
+
+    nsAutoCString Attachments ;
+    nsAutoCString TempFiles ;
+
+    nsCOMPtr <nsIFile> pFile = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID, &rv) ;
+    if (NS_FAILED(rv) || (!pFile) ) return rv ;
+    nsCOMPtr <nsIFile> pTempDir = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID, &rv) ;
+    if (NS_FAILED(rv) || (!pTempDir) ) return rv ;
+
+    for (int i=0 ; i < aFileCount ; i++)
+    {
+        if (aFiles[i].lpszPathName)
+        {
+            // check if attachment exists
+            if (aIsUnicode)
+                pFile->InitWithPath (nsDependentString(aFiles[i].lpszPathName));
+            else
+                pFile->InitWithNativePath (nsDependentCString((const char*)aFiles[i].lpszPathName));
+
+            bool bExist ;
+            rv = pFile->Exists(&bExist) ;
+            MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("nsMapiHook::HandleAttachments: filename: %s path: %s exists = %s \n", (const char*)aFiles[i].lpszFileName, (const char*)aFiles[i].lpszPathName, bExist ? "true" : "false"));
+            if (NS_FAILED(rv) || (!bExist) ) return NS_ERROR_FILE_TARGET_DOES_NOT_EXIST ;
+
+            //Temp Directory
+            nsCOMPtr <nsIFile> pTempDir;
+            NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(pTempDir));
+
+            // create a new sub directory called moz_mapi underneath the temp directory
+            pTempDir->AppendRelativePath(NS_LITERAL_STRING("moz_mapi"));
+            pTempDir->Exists (&bExist) ;
+            if (!bExist)
+            {
+                rv = pTempDir->Create(nsIFile::DIRECTORY_TYPE, 777) ;
+                if (NS_FAILED(rv)) return rv ;
+            }
+
+            // rename or copy the existing temp file with the real file name
+
+            nsAutoString leafName ;
+            // convert to Unicode using Platform charset
+            // leafName already contains a unicode leafName from lpszPathName. If we were given
+            // a value for lpszFileName, use it. Otherwise stick with leafName
+            if (aFiles[i].lpszFileName)
+            {
+              nsAutoString wholeFileName;
+                if (aIsUnicode)
+                    wholeFileName.Assign(aFiles[i].lpszFileName);
+                else
+                    ConvertToUnicode(nsMsgI18NFileSystemCharset(), (char *) aFiles[i].lpszFileName, wholeFileName);
+                // need to find the last '\' and find the leafname from that.
+                int32_t lastSlash = wholeFileName.RFindChar(char16_t('\\'));
+                if (lastSlash != kNotFound)
+                  leafName.Assign(Substring(wholeFileName, lastSlash + 1));
+                else
+                  leafName.Assign(wholeFileName);
+            }
+            else
+              pFile->GetLeafName (leafName);
+
+            nsCOMPtr<nsIMsgAttachment> attachment = do_CreateInstance(NS_MSGATTACHMENT_CONTRACTID, &rv);
+            NS_ENSURE_SUCCESS(rv, rv);
+            attachment->SetName(leafName);
+
+            nsCOMPtr<nsIFile> pTempFile;
+            rv = pTempDir->Clone(getter_AddRefs(pTempFile));
+            if (NS_FAILED(rv) || !pTempFile)
+              return rv;
+
+            pTempFile->Append(leafName);
+            pTempFile->Exists(&bExist);
+            if (bExist)
+            {
+              rv = pTempFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0777);
+              NS_ENSURE_SUCCESS(rv, rv);
+              pTempFile->Remove(false); // remove so we can copy over it.
+              pTempFile->GetLeafName(leafName);
+            }
+            // copy the file to its new location and file name
+            pFile->CopyTo(pTempDir, leafName);
+            // point pFile to the new location of the attachment
+            pFile->InitWithFile(pTempDir);
+            pFile->Append(leafName);
+
+            // create MsgCompose attachment object
+            attachment->SetTemporary(true); // this one is a temp file so set the flag for MsgCompose
+
+            // now set the attachment object
+            nsAutoCString pURL ;
+            NS_GetURLSpecFromFile(pFile, pURL);
+            attachment->SetUrl(pURL);
+
+            // set the file size
+            int64_t fileSize;
+            pFile->GetFileSize(&fileSize);
+            attachment->SetSize(fileSize);
+
+            // add the attachment
+            rv = aCompFields->AddAttachment (attachment);
+            if (NS_FAILED(rv))
+              MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("nsMapiHook::HandleAttachments: AddAttachment rv =  %lx\n", rv));
+        }
+    }
+    return rv ;
+}
+
+
+// this is used to convert non Unicode data and then populate comp fields
+nsresult nsMapiHook::PopulateCompFieldsWithConversion(lpnsMapiMessage aMessage,
+                                    nsIMsgCompFields * aCompFields)
+{
+  nsresult rv = NS_OK;
+
+  if (aMessage->lpOriginator)
+  {
+    nsAutoString From;
+    From.Append(NS_ConvertASCIItoUTF16((char *) aMessage->lpOriginator->lpszAddress));
+    aCompFields->SetFrom (From);
+  }
+
+  nsAutoString To;
+  nsAutoString Cc;
+  nsAutoString Bcc;
+  NS_NAMED_LITERAL_STRING(Comma, ",");
+  if (aMessage->lpRecips)
+  {
+    for (int i=0 ; i < (int) aMessage->nRecipCount ; i++)
+    {
+      if (aMessage->lpRecips[i].lpszAddress || aMessage->lpRecips[i].lpszName)
+      {
+        const char *addressWithoutType = (aMessage->lpRecips[i].lpszAddress)
+          ? aMessage->lpRecips[i].lpszAddress : aMessage->lpRecips[i].lpszName;
+        if (!PL_strncasecmp(addressWithoutType, "SMTP:", 5))
+          addressWithoutType += 5;
+
+        switch (aMessage->lpRecips[i].ulRecipClass)
+        {
+        case MAPI_TO :
+          if (!To.IsEmpty())
+            To += Comma ;
+          To.Append(NS_ConvertASCIItoUTF16(addressWithoutType));
+          break ;
+
+        case MAPI_CC :
+          if (!Cc.IsEmpty())
+            Cc += Comma ;
+          Cc.Append(NS_ConvertASCIItoUTF16(addressWithoutType));
+          break ;
+
+        case MAPI_BCC :
+          if (!Bcc.IsEmpty())
+              Bcc += Comma ;
+          Bcc.Append(NS_ConvertASCIItoUTF16(addressWithoutType));
+          break ;
+        }
+      }
+    }
+  }
+
+  // set To, Cc, Bcc
+  aCompFields->SetTo (To) ;
+  aCompFields->SetCc (Cc) ;
+  aCompFields->SetBcc (Bcc) ;
+
+  MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("to: %s cc: %s bcc: %s \n", NS_ConvertUTF16toUTF8(To).get(), NS_ConvertUTF16toUTF8(Cc).get(), NS_ConvertUTF16toUTF8(Bcc).get()));
+
+  nsAutoCString platformCharSet;
+  // set subject
+  if (aMessage->lpszSubject)
+  {
+    nsAutoString Subject ;
+    if (platformCharSet.IsEmpty())
+      platformCharSet.Assign(nsMsgI18NFileSystemCharset());
+    rv = ConvertToUnicode(platformCharSet.get(), (char *) aMessage->lpszSubject, Subject);
+    if (NS_FAILED(rv)) return rv;
+    aCompFields->SetSubject(Subject);
+  }
+
+  // handle attachments as File URL
+  rv = HandleAttachments (aCompFields, aMessage->nFileCount, aMessage->lpFiles, false) ;
+  if (NS_FAILED(rv)) return rv ;
+
+  // set body
+  if (aMessage->lpszNoteText)
+  {
+    nsAutoString Body ;
+    if (platformCharSet.IsEmpty())
+      platformCharSet.Assign(nsMsgI18NFileSystemCharset());
+    rv = ConvertToUnicode(platformCharSet.get(), (char *) aMessage->lpszNoteText, Body);
+    if (NS_FAILED(rv)) return rv ;
+    if (Body.IsEmpty() || Body.Last() != '\n')
+      Body.AppendLiteral(CRLF);
+
+    // This is needed when Simple MAPI is used without a compose window.
+    // See bug 1366196.
+    if (Body.Find("<html>") == kNotFound)
+      aCompFields->SetForcePlainText(true);
+
+    rv = aCompFields->SetBody(Body) ;
+  }
+
+#ifdef RAJIV_DEBUG
+  // testing what all was set in CompFields
+  printf ("To : %S \n", To.get()) ;
+  printf ("CC : %S \n", Cc.get() ) ;
+  printf ("BCC : %S \n", Bcc.get() ) ;
+#endif
+
+  return rv ;
+}
+
+// this is used to populate the docs as attachments in the Comp fields for Send Documents
+nsresult nsMapiHook::PopulateCompFieldsForSendDocs(nsIMsgCompFields * aCompFields, ULONG aFlags,
+                                                   LPTSTR aDelimChar, LPTSTR aFilePaths)
+{
+  nsAutoString strDelimChars ;
+  nsString strFilePaths;
+  nsresult rv = NS_OK ;
+  bool bExist ;
+
+  if (aDelimChar)
+    strDelimChars.Assign(aDelimChar);
+  if (aFilePaths)
+    strFilePaths.Assign(aFilePaths);
+
+  // check for comma in filename
+  if (strDelimChars.FindChar(',') == kNotFound)  // if comma is not in the delimiter specified by user
+  {
+    if (strFilePaths.FindChar(',') != kNotFound) // if comma found in filenames return error
+      return NS_ERROR_FILE_INVALID_PATH;
+  }
+
+  nsCString Attachments ;
+
+  // only 1 file is to be sent, no delim specified
+  if (strDelimChars.IsEmpty())
+      strDelimChars.AssignLiteral(";");
+
+  int32_t offset = 0 ;
+  int32_t FilePathsLen = strFilePaths.Length() ;
+  if (FilePathsLen)
+  {
+    nsAutoString Subject ;
+
+    // multiple files to be sent, delim specified
+    nsCOMPtr <nsIFile> pFile = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID, &rv) ;
+    if (NS_FAILED(rv) || (!pFile) ) return rv ;
+
+    char16_t * newFilePaths = (char16_t *) strFilePaths.get() ;
+    while (offset != kNotFound)
+    {
+      //Temp Directory
+      nsCOMPtr <nsIFile> pTempDir;
+      NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(pTempDir));
+
+      // if not already existing, create another temp dir for mapi within Win temp dir
+      // this is windows only so we can do "\\"
+      pTempDir->AppendRelativePath (NS_LITERAL_STRING("moz_mapi"));
+      pTempDir->Exists(&bExist) ;
+      if (!bExist)
+      {
+        rv = pTempDir->Create(nsIFile::DIRECTORY_TYPE, 777) ;
+        if (NS_FAILED(rv)) return rv ;
+      }
+
+      nsString RemainingPaths ;
+      RemainingPaths.Assign(newFilePaths) ;
+      offset = RemainingPaths.Find (strDelimChars) ;
+      if (offset != kNotFound)
+      {
+        RemainingPaths.SetLength (offset) ;
+        if ((offset + (int32_t)strDelimChars.Length()) < FilePathsLen)
+          newFilePaths += offset + strDelimChars.Length() ;
+        else
+          offset = kNotFound;
+        FilePathsLen -= offset + strDelimChars.Length();
+      }
+
+      if (RemainingPaths[1] != ':' && RemainingPaths[1] != '\\')
+      {
+        char cwd[MAX_PATH];
+        if (_getdcwd(_getdrive(), cwd, MAX_PATH))
+        {
+          nsAutoString cwdStr;
+          CopyASCIItoUTF16(cwd, cwdStr);
+          cwdStr.Append('\\');
+          RemainingPaths.Insert(cwdStr, 0);
+        }
+      }
+
+      pFile->InitWithPath (RemainingPaths) ;
+
+      rv = pFile->Exists(&bExist) ;
+      if (NS_FAILED(rv) || (!bExist) ) return NS_ERROR_FILE_TARGET_DOES_NOT_EXIST ;
+
+      // filename of the file attachment
+      nsAutoString leafName ;
+      pFile->GetLeafName (leafName) ;
+      if(NS_FAILED(rv) || leafName.IsEmpty()) return rv ;
+
+      if (!Subject.IsEmpty())
+          Subject.AppendLiteral(", ");
+      Subject += leafName;
+
+      // create MsgCompose attachment object
+      nsCOMPtr<nsIMsgAttachment> attachment = do_CreateInstance(NS_MSGATTACHMENT_CONTRACTID, &rv);
+      NS_ENSURE_SUCCESS(rv, rv);
+
+      nsDependentString fileNameNative(leafName.get());
+      rv = pFile->CopyTo(pTempDir, fileNameNative);
+      if (NS_FAILED(rv)) return rv;
+
+      // now turn pTempDir into a full file path to the temp file
+      pTempDir->Append(fileNameNative);
+
+      // this one is a temp file so set the flag for MsgCompose
+      attachment->SetTemporary(true);
+
+      // now set the attachment object
+      nsAutoCString pURL;
+      NS_GetURLSpecFromFile(pTempDir, pURL);
+      attachment->SetUrl(pURL);
+
+      // set the file size
+      int64_t fileSize;
+      pFile->GetFileSize(&fileSize);
+      attachment->SetSize(fileSize);
+
+      // add the attachment
+      rv = aCompFields->AddAttachment (attachment);
+      if (NS_FAILED(rv)) return rv;
+    }
+
+    rv = aCompFields->SetBody(Subject) ;
+  }
+
+  return rv ;
+}
+
+// this used for Send with UI
+nsresult nsMapiHook::ShowComposerWindow (unsigned long aSession, nsIMsgCompFields * aCompFields)
+{
+    nsresult rv = NS_OK ;
+
+    // create a send listener to get back the send status
+    nsCOMPtr <nsIMsgSendListener> sendListener ;
+    rv = nsMAPISendListener::CreateMAPISendListener(getter_AddRefs(sendListener)) ;
+    if (NS_FAILED(rv) || (!sendListener) ) return rv ;
+
+    // create the compose params object
+    nsCOMPtr<nsIMsgComposeParams> pMsgComposeParams (do_CreateInstance(NS_MSGCOMPOSEPARAMS_CONTRACTID, &rv));
+    if (NS_FAILED(rv) || (!pMsgComposeParams) ) return rv ;
+
+    // If we found HTML, compose in HTML.
+    bool forcePlainText;
+    aCompFields->GetForcePlainText(&forcePlainText);
+    pMsgComposeParams->SetFormat(forcePlainText ? nsIMsgCompFormat::Default : nsIMsgCompFormat::HTML);
+
+    // populate the compose params
+    pMsgComposeParams->SetType(nsIMsgCompType::New);
+
+    // Never force to plain text, the default format will take care of that.
+    // Undo the forcing that happened in PopulateCompFields/PopulateCompFieldsWithConversion.
+    // See bug 1095629 and bug 1366196.
+    aCompFields->SetForcePlainText(false);
+    pMsgComposeParams->SetComposeFields(aCompFields);
+    pMsgComposeParams->SetSendListener(sendListener);
+
+    /** get the nsIMsgComposeService object to open the compose window **/
+    nsCOMPtr <nsIMsgComposeService> compService = do_GetService (NS_MSGCOMPOSESERVICE_CONTRACTID) ;
+    if (NS_FAILED(rv)|| (!compService) ) return rv ;
+
+    rv = compService->OpenComposeWindowWithParams(nullptr, pMsgComposeParams) ;
+    if (NS_FAILED(rv)) return rv ;
+
+    return rv ;
+}
diff --git a/mailnews/mapi/mapihook/src/msgMapiHook.h b/mailnews/mapi/mapihook/src/msgMapiHook.h
new file mode 100644
index 000000000..8860d5227
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiHook.h
@@ -0,0 +1,33 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MSG_MAPI_HOOK_H_
+#define MSG_MAPI_HOOK_H_
+
+#include "prtypes.h"
+
+class nsMapiHook
+{
+    public :
+
+        static bool DisplayLoginDialog(bool aLogin, char16_t **aUsername, 
+                        char16_t **aPassword);
+        static bool VerifyUserName(const nsString& aUsername, nsCString& aIdKey);
+
+        static bool IsBlindSendAllowed () ;
+        static nsresult BlindSendMail (unsigned long aSession, nsIMsgCompFields * aCompFields) ;
+        static nsresult ShowComposerWindow (unsigned long aSession, nsIMsgCompFields * aCompFields) ;
+        static nsresult PopulateCompFields(lpnsMapiMessage aMessage, nsIMsgCompFields * aCompFields) ;
+        static nsresult PopulateCompFieldsWithConversion(lpnsMapiMessage aMessage, 
+                                        nsIMsgCompFields * aCompFields) ;
+        static nsresult PopulateCompFieldsForSendDocs(nsIMsgCompFields * aCompFields, 
+                                        ULONG aFlags, LPTSTR aDelimChar, LPTSTR aFilePaths) ;
+        static nsresult HandleAttachments (nsIMsgCompFields * aCompFields, int32_t aFileCount, 
+                                        lpnsMapiFileDesc aFiles, BOOL aIsUnicode) ;
+        static void CleanUp();
+
+        static bool isMapiService;
+};
+
+#endif  // MSG_MAPI_HOOK_H_
diff --git a/mailnews/mapi/mapihook/src/msgMapiImp.cpp b/mailnews/mapi/mapihook/src/msgMapiImp.cpp
new file mode 100644
index 000000000..9139d68c6
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiImp.cpp
@@ -0,0 +1,878 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <mapidefs.h>
+#include <mapi.h>
+#include "msgMapi.h"
+#include "msgMapiImp.h"
+#include "msgMapiFactory.h"
+#include "msgMapiMain.h"
+
+#include "nsIMsgCompFields.h"
+#include "msgMapiHook.h"
+#include "nsStringGlue.h"
+#include "nsCOMPtr.h"
+#include "nsISupports.h"
+#include "nsMsgCompCID.h"
+#include "nsIMsgDatabase.h"
+#include "nsMsgFolderFlags.h"
+#include "nsIMsgHdr.h"
+#include "MailNewsTypes.h"
+#include "nsMsgBaseCID.h"
+#include "nsIMsgAccountManager.h"
+#include "nsIMsgFolder.h"
+#include "nsIMsgImapMailFolder.h"
+#include <time.h>
+#include "nsIInputStream.h"
+#include "nsILineInputStream.h"
+#include "nsISeekableStream.h"
+#include "nsIFile.h"
+#include "nsIFileStreams.h"
+#include "nsNetCID.h"
+#include "nsMsgMessageFlags.h"
+#include "mozilla/mailnews/MimeHeaderParser.h"
+#include "mozilla/Logging.h"
+
+using namespace mozilla::mailnews;
+
+PRLogModuleInfo *MAPI;
+
+CMapiImp::CMapiImp()
+: m_cRef(1)
+{
+    m_Lock = PR_NewLock();
+  if (!MAPI)
+    MAPI = PR_NewLogModule("MAPI");
+}
+
+CMapiImp::~CMapiImp() 
+{ 
+    if (m_Lock)
+        PR_DestroyLock(m_Lock);
+}
+
+STDMETHODIMP CMapiImp::QueryInterface(const IID& aIid, void** aPpv)
+{    
+    if (aIid == IID_IUnknown)
+    {
+        *aPpv = static_cast<nsIMapi*>(this); 
+    }
+    else if (aIid == IID_nsIMapi)
+    {
+        *aPpv = static_cast<nsIMapi*>(this);
+    }
+    else
+    {
+        *aPpv = nullptr;
+        return E_NOINTERFACE;
+    }
+
+    reinterpret_cast<IUnknown*>(*aPpv)->AddRef();
+    return S_OK;
+}
+
+STDMETHODIMP_(ULONG) CMapiImp::AddRef()
+{
+    return ++m_cRef;
+}
+
+STDMETHODIMP_(ULONG) CMapiImp::Release() 
+{
+    int32_t temp = --m_cRef;
+    if (m_cRef == 0)
+    {
+        delete this;
+        return 0;
+    }
+
+    return temp;
+}
+
+STDMETHODIMP CMapiImp::IsValid()
+{
+    return S_OK;
+}
+
+STDMETHODIMP CMapiImp::IsValidSession(unsigned long aSession)
+{
+    nsMAPIConfiguration *pConfig = nsMAPIConfiguration::GetMAPIConfiguration();
+    if (pConfig && pConfig->IsSessionValid(aSession))
+        return S_OK;
+
+    return E_FAIL;
+}
+
+STDMETHODIMP CMapiImp::Initialize()
+{
+    HRESULT hr = E_FAIL;
+
+    if (!m_Lock)
+        return E_FAIL;
+
+    PR_Lock(m_Lock);
+
+    // Initialize MAPI Configuration
+
+    nsMAPIConfiguration *pConfig = nsMAPIConfiguration::GetMAPIConfiguration();
+    if (pConfig != nullptr)
+      hr = S_OK;
+
+    PR_Unlock(m_Lock);
+
+    return hr;
+}
+
+STDMETHODIMP CMapiImp::Login(unsigned long aUIArg, LOGIN_PW_TYPE aLogin, LOGIN_PW_TYPE aPassWord,
+                unsigned long aFlags, unsigned long *aSessionId)
+{
+    HRESULT hr = E_FAIL;
+     bool bNewSession = false;
+    nsCString id_key;
+
+    MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::Login using flags %d\n", aFlags));
+    if (aFlags & MAPI_NEW_SESSION)
+        bNewSession = true;
+
+    // Check For Profile Name
+    if (aLogin != nullptr && aLogin[0] != '\0')
+    {
+        if (!nsMapiHook::VerifyUserName(nsString(aLogin), id_key))
+        {
+            *aSessionId = MAPI_E_LOGIN_FAILURE;
+            MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::Login failed for username %s\n", aLogin));
+            NS_ASSERTION(false, "failed verifying user name");
+            return hr;
+        }
+    }
+    else
+    {
+      // get default account
+      nsresult rv;
+      nsCOMPtr <nsIMsgAccountManager> accountManager = 
+        do_GetService(NS_MSGACCOUNTMANAGER_CONTRACTID, &rv); 
+      NS_ENSURE_SUCCESS(rv,MAPI_E_LOGIN_FAILURE);
+      nsCOMPtr <nsIMsgAccount> account;
+      nsCOMPtr <nsIMsgIdentity> identity;
+      rv = accountManager->GetDefaultAccount(getter_AddRefs(account));
+      NS_ENSURE_SUCCESS(rv,MAPI_E_LOGIN_FAILURE);
+      rv = account->GetDefaultIdentity(getter_AddRefs(identity));
+      NS_ENSURE_SUCCESS(rv,MAPI_E_LOGIN_FAILURE);
+      if (!identity)
+        return MAPI_E_LOGIN_FAILURE;
+      identity->GetKey(id_key);
+    }
+
+    // finally register(create) the session.
+    uint32_t nSession_Id;
+    int16_t nResult = 0;
+
+    nsMAPIConfiguration *pConfig = nsMAPIConfiguration::GetMAPIConfiguration();
+    if (pConfig != nullptr)
+        nResult = pConfig->RegisterSession(aUIArg, wwc(aLogin), wwc(aPassWord),
+                                           (aFlags & MAPI_FORCE_DOWNLOAD), bNewSession,
+                                           &nSession_Id, id_key.get());
+    switch (nResult)
+    {
+        case -1 :
+        {
+            *aSessionId = MAPI_E_TOO_MANY_SESSIONS;
+            return hr;
+        }
+        case 0 :
+        {
+            *aSessionId = MAPI_E_INSUFFICIENT_MEMORY;
+            return hr;
+        }
+        default :
+        {
+            *aSessionId = nSession_Id;
+            MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::Login succeeded\n"));
+            break;
+        }
+    }
+
+    return S_OK;
+}
+
+STDMETHODIMP CMapiImp::SendMail( unsigned long aSession, lpnsMapiMessage aMessage,
+     short aRecipCount, lpnsMapiRecipDesc aRecips , short aFileCount, lpnsMapiFileDesc aFiles , 
+     unsigned long aFlags, unsigned long aReserved)
+{
+    nsresult rv = NS_OK ;
+
+    MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::SendMail using flags %d\n", aFlags));
+    // Assign the pointers in the aMessage struct to the array of Recips and Files
+    // received here from MS COM. These are used in BlindSendMail and ShowCompWin fns 
+    aMessage->lpRecips = aRecips ;
+    aMessage->lpFiles = aFiles ;
+
+    MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::SendMail flags=%x subject: %s sender: %s\n", 
+      aFlags, (char *) aMessage->lpszSubject, (aMessage->lpOriginator) ? aMessage->lpOriginator->lpszAddress : ""));
+
+    /** create nsIMsgCompFields obj and populate it **/
+    nsCOMPtr<nsIMsgCompFields> pCompFields = do_CreateInstance(NS_MSGCOMPFIELDS_CONTRACTID, &rv) ;
+    if (NS_FAILED(rv) || (!pCompFields) ) return MAPI_E_INSUFFICIENT_MEMORY ;
+
+    if (aFlags & MAPI_UNICODE)
+        rv = nsMapiHook::PopulateCompFields(aMessage, pCompFields) ;
+    else
+        rv = nsMapiHook::PopulateCompFieldsWithConversion(aMessage, pCompFields) ;
+    
+    if (NS_SUCCEEDED (rv))
+    {
+        // see flag to see if UI needs to be brought up
+        if (!(aFlags & MAPI_DIALOG))
+        {
+            rv = nsMapiHook::BlindSendMail(aSession, pCompFields);
+        }
+        else
+        {
+            rv = nsMapiHook::ShowComposerWindow(aSession, pCompFields);
+        }
+    }
+    
+    return nsMAPIConfiguration::GetMAPIErrorFromNSError (rv) ;
+}
+
+
+STDMETHODIMP CMapiImp::SendDocuments( unsigned long aSession, LPTSTR aDelimChar,
+                            LPTSTR aFilePaths, LPTSTR aFileNames, ULONG aFlags)
+{
+    nsresult rv = NS_OK ;
+
+    MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::SendDocument using flags %d\n", aFlags));
+    /** create nsIMsgCompFields obj and populate it **/
+    nsCOMPtr<nsIMsgCompFields> pCompFields = do_CreateInstance(NS_MSGCOMPFIELDS_CONTRACTID, &rv) ;
+    if (NS_FAILED(rv) || (!pCompFields) ) return MAPI_E_INSUFFICIENT_MEMORY ;
+
+    if (aFilePaths)
+    {
+        rv = nsMapiHook::PopulateCompFieldsForSendDocs(pCompFields, aFlags, aDelimChar, aFilePaths) ;
+    }
+
+    if (NS_SUCCEEDED (rv)) 
+        rv = nsMapiHook::ShowComposerWindow(aSession, pCompFields);
+    else
+      MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::SendDocument error rv = %lx, paths = %s names = %s\n", rv, aFilePaths, aFileNames));
+
+    return nsMAPIConfiguration::GetMAPIErrorFromNSError (rv) ;
+}
+
+nsresult CMapiImp::GetDefaultInbox(nsIMsgFolder **inboxFolder)
+{
+  // get default account
+  nsresult rv;
+  nsCOMPtr <nsIMsgAccountManager> accountManager = 
+    do_GetService(NS_MSGACCOUNTMANAGER_CONTRACTID, &rv); 
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCOMPtr <nsIMsgAccount> account;
+  rv = accountManager->GetDefaultAccount(getter_AddRefs(account));
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // get incoming server
+  nsCOMPtr <nsIMsgIncomingServer> server;
+  rv = account->GetIncomingServer(getter_AddRefs(server));
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCString type;
+  rv = server->GetType(type);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // we only care about imap and pop3
+  if (type.EqualsLiteral("imap") || type.EqualsLiteral("pop3"))
+  {
+    // imap and pop3 account should have an Inbox
+    nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+    rv = server->GetRootMsgFolder(getter_AddRefs(rootMsgFolder));
+    NS_ENSURE_SUCCESS(rv,rv);
+ 
+    if (!rootMsgFolder)
+      return NS_ERROR_FAILURE;
+ 
+    rootMsgFolder->GetFolderWithFlags(nsMsgFolderFlags::Inbox, inboxFolder);
+    if (!*inboxFolder)
+     return NS_ERROR_FAILURE;
+ 
+  }
+  return NS_OK;
+}
+
+//*****************************************************************************
+// Encapsulate the XP DB stuff required to enumerate messages
+
+class MsgMapiListContext 
+{
+public:
+  MsgMapiListContext () {}
+  ~MsgMapiListContext ();
+  
+  nsresult OpenDatabase (nsIMsgFolder *folder);
+  
+  nsMsgKey GetNext ();
+  nsresult MarkRead (nsMsgKey key, bool read);
+  
+  lpnsMapiMessage GetMessage (nsMsgKey, unsigned long flFlags);
+  bool IsIMAPHost(void);
+  bool DeleteMessage(nsMsgKey key);
+  
+protected:
+  
+  char *ConvertDateToMapiFormat (time_t);
+  char *ConvertBodyToMapiFormat (nsIMsgDBHdr *hdr);
+  void ConvertRecipientsToMapiFormat(const nsCOMArray<msgIAddressObject> &ourRecips,
+                                     lpnsMapiRecipDesc mapiRecips,
+                                     int mapiRecipClass);
+  
+  nsCOMPtr <nsIMsgFolder> m_folder;
+  nsCOMPtr <nsIMsgDatabase> m_db;
+  nsCOMPtr <nsISimpleEnumerator> m_msgEnumerator;
+};
+
+
+LONG CMapiImp::InitContext(unsigned long session, MsgMapiListContext **listContext)
+{
+  nsMAPIConfiguration * pMapiConfig = nsMAPIConfiguration::GetMAPIConfiguration() ;
+  if (!pMapiConfig)
+    return MAPI_E_FAILURE ;  // get the singelton obj
+  *listContext = (MsgMapiListContext *) pMapiConfig->GetMapiListContext(session);
+  // This is the first message
+  if (!*listContext)
+  {
+    nsCOMPtr <nsIMsgFolder> inboxFolder;
+    nsresult rv = GetDefaultInbox(getter_AddRefs(inboxFolder));
+    if (NS_FAILED(rv))
+    {
+      NS_ASSERTION(false, "in init context, no inbox");
+      return(MAPI_E_NO_MESSAGES);
+    }
+
+    *listContext = new MsgMapiListContext;
+    if (!*listContext)
+      return MAPI_E_INSUFFICIENT_MEMORY;
+
+    rv = (*listContext)->OpenDatabase(inboxFolder);
+    if (NS_FAILED(rv))
+    {
+      pMapiConfig->SetMapiListContext(session, NULL);
+      delete *listContext;
+      NS_ASSERTION(false, "in init context, unable to open db");
+      return MAPI_E_NO_MESSAGES;
+    }
+    else
+      pMapiConfig->SetMapiListContext(session, *listContext);
+  }
+  return SUCCESS_SUCCESS;
+}
+
+STDMETHODIMP CMapiImp::FindNext(unsigned long aSession, unsigned long ulUIParam, LPTSTR lpszMessageType,
+                              LPTSTR lpszSeedMessageID, unsigned long flFlags, unsigned long ulReserved,
+                              unsigned char lpszMessageID[64])
+
+{
+  //
+  // If this is true, then this is the first call to this FindNext function
+  // and we should start the enumeration operation.
+  //
+
+  *lpszMessageID = '\0';
+  nsMAPIConfiguration * pMapiConfig = nsMAPIConfiguration::GetMAPIConfiguration() ;
+  if (!pMapiConfig) 
+  {
+    NS_ASSERTION(false, "failed to get config in findnext");
+    return MAPI_E_FAILURE ;  // get the singelton obj
+  }
+  MsgMapiListContext *listContext;
+  LONG ret = InitContext(aSession, &listContext);
+  if (ret != SUCCESS_SUCCESS)
+  {
+    NS_ASSERTION(false, "init context failed");
+    return ret;
+  }
+  NS_ASSERTION(listContext, "initContext returned null context");
+  if (listContext)
+  {
+//    NS_ASSERTION(false, "find next init context succeeded");
+    nsMsgKey nextKey = listContext->GetNext();
+    if (nextKey == nsMsgKey_None)
+    {
+      pMapiConfig->SetMapiListContext(aSession, NULL);
+      delete listContext;
+      return(MAPI_E_NO_MESSAGES);
+    }
+
+//    TRACE("MAPI: ProcessMAPIFindNext() Found message id = %d\n", nextKey);
+
+    sprintf((char *) lpszMessageID, "%d", nextKey);
+  }
+
+  MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::FindNext returning key %s\n", (char *) lpszMessageID));
+  return(SUCCESS_SUCCESS);
+}
+
+STDMETHODIMP CMapiImp::ReadMail(unsigned long aSession, unsigned long ulUIParam, LPTSTR lpszMessageID,
+                              unsigned long flFlags, unsigned long ulReserved, lpnsMapiMessage *lppMessage)
+{
+  nsresult irv;
+  nsAutoCString keyString((char *) lpszMessageID);
+  MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("CMapiImp::ReadMail asking for key %s\n", (char *) lpszMessageID));
+  nsMsgKey msgKey = keyString.ToInteger(&irv);
+  if (NS_FAILED(irv))
+  {
+    NS_ASSERTION(false, "invalid lpszMessageID");
+    return MAPI_E_INVALID_MESSAGE;
+  }
+  MsgMapiListContext *listContext;
+  LONG ret = InitContext(aSession, &listContext);
+  if (ret != SUCCESS_SUCCESS)
+  {
+    NS_ASSERTION(false, "init context failed in ReadMail");
+    return ret;
+  }
+  *lppMessage = listContext->GetMessage (msgKey, flFlags);
+  NS_ASSERTION(*lppMessage, "get message failed");
+
+  return (*lppMessage) ? SUCCESS_SUCCESS : E_FAIL;
+}
+
+
+STDMETHODIMP CMapiImp::DeleteMail(unsigned long aSession, unsigned long ulUIParam, LPTSTR lpszMessageID,
+                              unsigned long flFlags, unsigned long ulReserved)
+{
+  nsresult irv;
+  nsAutoCString keyString((char *) lpszMessageID);
+  nsMsgKey msgKey = keyString.ToInteger(&irv);
+  // XXX Why do we return success on failure?
+  if (NS_FAILED(irv))
+    return SUCCESS_SUCCESS;
+  MsgMapiListContext *listContext;
+  LONG ret = InitContext(aSession, &listContext);
+  if (ret != SUCCESS_SUCCESS)
+    return ret;
+  return (listContext->DeleteMessage(msgKey)) ? SUCCESS_SUCCESS : MAPI_E_INVALID_MESSAGE;
+}
+
+STDMETHODIMP CMapiImp::SaveMail(unsigned long aSession, unsigned long ulUIParam,  lpnsMapiMessage lppMessage,
+                              unsigned long flFlags, unsigned long ulReserved, LPTSTR lpszMessageID)
+{
+  MsgMapiListContext *listContext;
+  LONG ret = InitContext(aSession, &listContext);
+  if (ret != SUCCESS_SUCCESS)
+    return ret;
+  return S_OK;
+}
+
+
+STDMETHODIMP CMapiImp::Logoff (unsigned long aSession)
+{
+    nsMAPIConfiguration *pConfig = nsMAPIConfiguration::GetMAPIConfiguration();
+
+    if (pConfig->UnRegisterSession((uint32_t)aSession))
+        return S_OK;
+
+    return E_FAIL;
+}
+
+STDMETHODIMP CMapiImp::CleanUp()
+{
+    nsMapiHook::CleanUp();
+    return S_OK;
+}
+
+
+#define           MAX_NAME_LEN    256
+
+
+MsgMapiListContext::~MsgMapiListContext ()
+{
+  if (m_db)
+    m_db->Close(false);
+}
+
+
+nsresult MsgMapiListContext::OpenDatabase (nsIMsgFolder *folder)
+{
+  nsresult dbErr = NS_ERROR_FAILURE;
+  if (folder)
+  {
+    m_folder = folder;
+    dbErr = folder->GetMsgDatabase(getter_AddRefs(m_db));
+    if (m_db)
+      dbErr = m_db->EnumerateMessages(getter_AddRefs(m_msgEnumerator));
+  }
+  return dbErr;
+}
+
+bool 
+MsgMapiListContext::IsIMAPHost(void)
+{
+  if (!m_folder) 
+    return FALSE;
+  nsCOMPtr <nsIMsgImapMailFolder> imapFolder = do_QueryInterface(m_folder);
+
+  return imapFolder != nullptr;
+}
+
+nsMsgKey MsgMapiListContext::GetNext ()
+{
+  nsMsgKey key = nsMsgKey_None;
+  bool      keepTrying = TRUE;
+  
+//  NS_ASSERTION (m_msgEnumerator && m_db, "need enumerator and db");
+  if (m_msgEnumerator && m_db)
+  {
+    
+    do 
+    {
+      keepTrying = FALSE;  
+      nsCOMPtr <nsISupports> hdrISupports;
+      nsCOMPtr <nsIMsgDBHdr> msgHdr;
+      if (NS_SUCCEEDED(m_msgEnumerator->GetNext(getter_AddRefs(hdrISupports))) && hdrISupports)
+      {
+        msgHdr = do_QueryInterface(hdrISupports);
+        msgHdr->GetMessageKey(&key);
+        
+        // Check here for IMAP message...if not, just return...
+        if (!IsIMAPHost())
+          return key;
+        
+        // If this is an IMAP message, we have to make sure we have a valid
+        // body to work with.
+        uint32_t  flags = 0;
+        
+        (void) msgHdr->GetFlags(&flags);
+        if (flags & nsMsgMessageFlags::Offline) 
+          return key;
+        
+        // Ok, if we get here, we have an IMAP message without a body!
+        // We need to keep trying by calling the GetNext member recursively...
+        keepTrying = TRUE;
+      }
+    } while (keepTrying);
+  }
+  
+  return key;
+}
+
+
+nsresult MsgMapiListContext::MarkRead (nsMsgKey key, bool read)
+{
+  nsresult err = NS_ERROR_FAILURE;
+  NS_ASSERTION(m_db, "no db");
+  if (m_db)
+    err = m_db->MarkRead (key, read, nullptr);
+  return err;
+}
+
+
+lpnsMapiMessage MsgMapiListContext::GetMessage (nsMsgKey key, unsigned long flFlags)
+{
+  lpnsMapiMessage message = (lpnsMapiMessage) CoTaskMemAlloc (sizeof(nsMapiMessage));
+  memset(message, 0, sizeof(nsMapiMessage));
+  if (message)
+  {
+    nsCString subject;
+    nsCString author;
+    nsCOMPtr <nsIMsgDBHdr> msgHdr;
+
+    nsresult rv = m_db->GetMsgHdrForKey (key, getter_AddRefs(msgHdr));
+    if (msgHdr)
+    {
+      msgHdr->GetSubject (getter_Copies(subject));
+      message->lpszSubject = (char *) CoTaskMemAlloc(subject.Length() + 1);
+      strcpy((char *) message->lpszSubject, subject.get());
+      uint32_t date;
+      (void) msgHdr->GetDateInSeconds(&date);
+      message->lpszDateReceived = ConvertDateToMapiFormat (date);
+      
+      // Pull out the flags info
+      // anything to do with MAPI_SENT? Since we're only reading the Inbox, I guess not
+      uint32_t ourFlags;
+      (void) msgHdr->GetFlags(&ourFlags);
+      if (!(ourFlags & nsMsgMessageFlags::Read))
+        message->flFlags |= MAPI_UNREAD;
+      if (ourFlags & (nsMsgMessageFlags::MDNReportNeeded | nsMsgMessageFlags::MDNReportSent))
+        message->flFlags |= MAPI_RECEIPT_REQUESTED;
+      
+      // Pull out the author/originator info
+      message->lpOriginator = (lpnsMapiRecipDesc) CoTaskMemAlloc (sizeof(nsMapiRecipDesc));
+      memset(message->lpOriginator, 0, sizeof(nsMapiRecipDesc));
+      if (message->lpOriginator)
+      {
+        msgHdr->GetAuthor (getter_Copies(author));
+        ConvertRecipientsToMapiFormat(EncodedHeader(author),
+          message->lpOriginator, MAPI_ORIG);
+      }
+      // Pull out the To/CC info
+      nsCString recipients, ccList;
+      msgHdr->GetRecipients(getter_Copies(recipients));
+      msgHdr->GetCcList(getter_Copies(ccList));
+
+      nsCOMArray<msgIAddressObject> parsedToRecips = EncodedHeader(recipients);
+      nsCOMArray<msgIAddressObject> parsedCCRecips = EncodedHeader(ccList);
+      uint32_t numToRecips = parsedToRecips.Length();
+      uint32_t numCCRecips = parsedCCRecips.Length();
+
+      message->lpRecips = (lpnsMapiRecipDesc) CoTaskMemAlloc ((numToRecips + numCCRecips) * sizeof(MapiRecipDesc));
+      memset(message->lpRecips, 0, (numToRecips + numCCRecips) * sizeof(MapiRecipDesc));
+      if (message->lpRecips)
+      {
+        ConvertRecipientsToMapiFormat(parsedToRecips, message->lpRecips,
+          MAPI_TO);
+        ConvertRecipientsToMapiFormat(parsedCCRecips,
+          &message->lpRecips[numToRecips], MAPI_CC);
+      }
+  
+      MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("MsgMapiListContext::GetMessage flags=%x subject %s date %s sender %s\n", 
+        flFlags, (char *) message->lpszSubject,(char *) message->lpszDateReceived, author.get()) );
+
+      // Convert any body text that we have locally
+      if (!(flFlags & MAPI_ENVELOPE_ONLY))
+        message->lpszNoteText = (char *) ConvertBodyToMapiFormat (msgHdr);
+      
+    }
+    if (! (flFlags & (MAPI_PEEK | MAPI_ENVELOPE_ONLY)))
+      m_db->MarkRead(key, true, nullptr);
+  }
+  return message;
+}
+
+
+char *MsgMapiListContext::ConvertDateToMapiFormat (time_t ourTime)
+{
+  char *date = (char*) CoTaskMemAlloc(32);
+  if (date)
+  {
+    // MAPI time format is YYYY/MM/DD HH:MM
+    // Note that we're not using XP_StrfTime because that localizes the time format,
+    // and the way I read the MAPI spec is that their format is canonical, not localized.
+    struct tm *local = localtime (&ourTime);
+    if (local)
+      strftime (date, 32, "%Y/%m/%d %I:%M", local); //use %H if hours should be 24 hour format
+  }
+  return date;
+}
+
+
+void MsgMapiListContext::ConvertRecipientsToMapiFormat(
+    const nsCOMArray<msgIAddressObject> &recipients,
+    lpnsMapiRecipDesc mapiRecips, int mapiRecipClass)
+{
+  nsTArray<nsCString> names, addresses;
+  ExtractAllAddresses(recipients, UTF16ArrayAdapter<>(names),
+    UTF16ArrayAdapter<>(addresses));
+  
+  size_t numAddresses = names.Length();
+  for (size_t i = 0; i < numAddresses; i++)
+  {
+    if (!names[i].IsEmpty())
+    {
+      mapiRecips[i].lpszName = (char *) CoTaskMemAlloc(names[i].Length() + 1);
+      if (mapiRecips[i].lpszName)
+        strcpy((char *)mapiRecips[i].lpszName, names[i].get());
+    }
+    if (!addresses[i].IsEmpty())
+    {
+      mapiRecips[i].lpszName = (char *) CoTaskMemAlloc(addresses[i].Length() + 1);
+      if (mapiRecips[i].lpszName)
+        strcpy((char *)mapiRecips[i].lpszName, addresses[i].get());
+    }
+    mapiRecips[i].ulRecipClass = mapiRecipClass;
+  }
+}
+
+
+char *MsgMapiListContext::ConvertBodyToMapiFormat (nsIMsgDBHdr *hdr)
+{
+  const int kBufLen = 64000; // I guess we only return the first 64K of a message.
+#define EMPTY_MESSAGE_LINE(buf) (buf[0] == '\r' || buf[0] == '\n' || buf[0] == '\0')
+
+  nsCOMPtr <nsIMsgFolder> folder;
+  hdr->GetFolder(getter_AddRefs(folder));
+  if (!folder)
+    return nullptr;
+
+  nsCOMPtr <nsIInputStream> inputStream;
+  nsCOMPtr <nsIFile> localFile;
+  folder->GetFilePath(getter_AddRefs(localFile));
+
+  nsresult rv;
+  nsCOMPtr<nsIFileInputStream> fileStream = do_CreateInstance(NS_LOCALFILEINPUTSTREAM_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, nullptr);
+
+  rv = fileStream->Init(localFile,  PR_RDONLY, 0664, false);  //just have to read the messages
+  inputStream = do_QueryInterface(fileStream);
+
+  if (inputStream)
+  {
+    nsCOMPtr <nsILineInputStream> fileLineStream = do_QueryInterface(inputStream);
+    if (!fileLineStream)
+      return nullptr;
+    // ### really want to skip past headers...
+    uint64_t messageOffset;
+    uint32_t lineCount;
+    hdr->GetMessageOffset(&messageOffset);
+    hdr->GetLineCount(&lineCount);
+    nsCOMPtr <nsISeekableStream> seekableStream = do_QueryInterface(inputStream);
+    seekableStream->Seek(PR_SEEK_SET, messageOffset);
+    bool hasMore = true;
+    nsAutoCString curLine;
+    nsresult rv = NS_OK;
+    while (hasMore) // advance past message headers
+    {
+      nsresult rv = fileLineStream->ReadLine(curLine, &hasMore);
+      if (NS_FAILED(rv) || EMPTY_MESSAGE_LINE(curLine))
+        break;
+    }
+    uint32_t msgSize;
+    hdr->GetMessageSize(&msgSize);
+    if (msgSize > kBufLen)
+      msgSize = kBufLen - 1;
+    // this is too big, since it includes the msg hdr size...oh well
+    char *body = (char*) CoTaskMemAlloc (msgSize + 1);
+
+    if (!body)
+      return nullptr;
+    int32_t bytesCopied = 0;
+    for (hasMore = TRUE; lineCount > 0 && hasMore && NS_SUCCEEDED(rv); lineCount--)
+    {
+      rv = fileLineStream->ReadLine(curLine, &hasMore);
+      if (NS_FAILED(rv))
+        break;
+      curLine.Append(CRLF);
+      // make sure we have room left
+      if (bytesCopied + curLine.Length() < msgSize)
+      {
+        strcpy(body + bytesCopied, curLine.get());
+        bytesCopied += curLine.Length();
+      }
+    }
+    MOZ_LOG(MAPI, mozilla::LogLevel::Debug, ("ConvertBodyToMapiFormat size=%x allocated size %x body = %100.100s\n", 
+        bytesCopied, msgSize + 1, (char *) body) );
+    body[bytesCopied] = '\0';   // rhp - fix last line garbage...
+    return body;
+  }
+  return nullptr;
+}
+
+
+//*****************************************************************************
+// MSGMAPI API implementation
+
+
+
+static void msg_FreeMAPIFile(lpMapiFileDesc f)
+{
+  if (f)
+  {
+    CoTaskMemFree(f->lpszPathName);
+    CoTaskMemFree(f->lpszFileName);
+  }
+}
+
+static void msg_FreeMAPIRecipient(lpMapiRecipDesc rd)
+{
+  if (rd)
+  {
+    if (rd->lpszName)
+      CoTaskMemFree(rd->lpszName);
+    if (rd->lpszAddress)
+      CoTaskMemFree(rd->lpszAddress);
+    // CoTaskMemFree(rd->lpEntryID);  
+  }
+}
+
+extern "C" void MSG_FreeMapiMessage (lpMapiMessage msg)
+{
+  ULONG i;
+  
+  if (msg)
+  {
+    CoTaskMemFree(msg->lpszSubject);
+    CoTaskMemFree(msg->lpszNoteText);
+    CoTaskMemFree(msg->lpszMessageType);
+    CoTaskMemFree(msg->lpszDateReceived);
+    CoTaskMemFree(msg->lpszConversationID);
+    
+    if (msg->lpOriginator)
+      msg_FreeMAPIRecipient(msg->lpOriginator);
+    
+    for (i=0; i<msg->nRecipCount; i++)
+      if (&(msg->lpRecips[i]) != nullptr)
+        msg_FreeMAPIRecipient(&(msg->lpRecips[i]));
+      
+      CoTaskMemFree(msg->lpRecips);
+      
+      for (i=0; i<msg->nFileCount; i++)
+        if (&(msg->lpFiles[i]) != nullptr)
+          msg_FreeMAPIFile(&(msg->lpFiles[i]));
+        
+      CoTaskMemFree(msg->lpFiles);
+      
+      CoTaskMemFree(msg);
+  }
+}
+
+
+extern "C" bool MsgMarkMapiMessageRead (nsIMsgFolder *folder, nsMsgKey key, bool read)
+{
+  bool success = FALSE;
+  MsgMapiListContext *context = new MsgMapiListContext();
+  if (context)
+  {
+    if (NS_SUCCEEDED(context->OpenDatabase(folder)))
+    {
+      if (NS_SUCCEEDED(context->MarkRead (key, read)))
+        success = TRUE;
+    }
+    delete context;
+  }
+  return success;
+}
+
+bool 
+MsgMapiListContext::DeleteMessage(nsMsgKey key)
+{
+  if (!m_db)
+    return FALSE;
+  
+  if ( !IsIMAPHost() )
+  {
+    return NS_SUCCEEDED((m_db->DeleteMessages(1, &key, nullptr)));
+  }
+#if 0 
+  else if ( m_folder->GetIMAPFolderInfoMail() )
+  {
+    AutoTArray<nsMsgKey, 1> messageKeys;
+    messageKeys.AppendElement(key);
+
+    (m_folder->GetIMAPFolderInfoMail())->DeleteSpecifiedMessages(pane, messageKeys, nsMsgKey_None);
+    m_db->DeleteMessage(key, nullptr, FALSE);
+    return TRUE;
+  }
+#endif
+  else
+  {
+    return FALSE;
+  }
+}
+
+/* Return TRUE on success, FALSE on failure */
+extern "C" bool MSG_DeleteMapiMessage(nsIMsgFolder *folder, nsMsgKey key)
+{
+  bool success = FALSE;
+  MsgMapiListContext *context = new MsgMapiListContext();
+  if (context) 
+  {
+    if (NS_SUCCEEDED(context->OpenDatabase(folder)))
+    {
+      success = context->DeleteMessage(key);
+    }
+    
+    delete context;
+  }
+  
+  return success;
+}
+
diff --git a/mailnews/mapi/mapihook/src/msgMapiImp.h b/mailnews/mapi/mapihook/src/msgMapiImp.h
new file mode 100644
index 000000000..875e9c6cf
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiImp.h
@@ -0,0 +1,77 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MSG_MAPI_IMP_H
+#define MSG_MAPI_IMP_H
+
+#include <windows.h>
+#include <mapi.h>
+#include "msgMapi.h"
+#include "nspr.h"
+#include "nscore.h"
+#include "nsISupportsImpl.h" // ThreadSafeAutoRefCnt
+
+class nsIMsgFolder;
+class MsgMapiListContext;
+
+const CLSID CLSID_CMapiImp = {0x29f458be, 0x8866, 0x11d5, {0xa3, 0xdd, 0x0, 0xb0, 0xd0, 0xf3, 0xba, 0xa7}};
+
+// this class implements the MS COM interface nsIMapi that provides the methods
+// called by mapi32.dll to perform the mail operations as specified by MAPI.
+// These class methods in turn use the Mozilla Mail XPCOM interfaces to do so.
+class CMapiImp : public nsIMapi
+{
+
+public :
+
+  // IUnknown
+
+  STDMETHODIMP            QueryInterface(const IID& aIid, void** aPpv);
+  STDMETHODIMP_(ULONG)    AddRef();
+  STDMETHODIMP_(ULONG)    Release();
+
+  // Interface INsMapi
+
+  STDMETHODIMP Login(unsigned long aUIArg, LOGIN_PW_TYPE aLogin, 
+                     LOGIN_PW_TYPE aPassWord, unsigned long aFlags,
+                     unsigned long *aSessionId);
+
+  STDMETHODIMP SendMail( unsigned long aSession, lpnsMapiMessage aMessage,
+       short aRecipCount, lpnsMapiRecipDesc aRecips , 
+       short aFileCount, lpnsMapiFileDesc aFiles , 
+       unsigned long aFlags, unsigned long aReserved) ;
+
+  STDMETHODIMP SendDocuments( unsigned long aSession, LPTSTR aDelimChar,
+                              LPTSTR aFilePaths, LPTSTR aFileNames, ULONG aFlags);
+
+  STDMETHODIMP FindNext(  unsigned long aSession, unsigned long ulUIParam, LPTSTR lpszMessageType,
+                            LPTSTR lpszSeedMessageID, unsigned long flFlags, unsigned long ulReserved,
+                            unsigned char lpszMessageID[64] );
+
+  STDMETHODIMP ReadMail(unsigned long lhSession, unsigned long ulUIParam, LPTSTR lpszMessageID,
+                            unsigned long flFlags, unsigned long ulReserved, lpnsMapiMessage *lppMessage);
+  STDMETHODIMP DeleteMail(unsigned long lhSession, unsigned long ulUIParam, LPTSTR lpszMessageID,
+                            unsigned long flFlags, unsigned long ulReserved);
+  STDMETHODIMP SaveMail(unsigned long lhSession, unsigned long ulUIParam, lpnsMapiMessage lppMessage,
+                            unsigned long flFlags, unsigned long ulReserved, LPTSTR lpszMessageID);
+
+  STDMETHODIMP Initialize();
+  STDMETHODIMP IsValid();
+  STDMETHODIMP IsValidSession(unsigned long aSession);
+
+  STDMETHODIMP Logoff (unsigned long aSession);
+  STDMETHODIMP CleanUp();
+
+  CMapiImp();
+  ~CMapiImp();
+
+  LONG InitContext(unsigned long session, MsgMapiListContext **listContext);
+  nsresult GetDefaultInbox(nsIMsgFolder **inboxFolder);
+
+private :
+  PRLock *m_Lock;
+  mozilla::ThreadSafeAutoRefCnt m_cRef;
+};
+
+#endif // MSG_MAPI_IMP_H
diff --git a/mailnews/mapi/mapihook/src/msgMapiMain.cpp b/mailnews/mapi/mapihook/src/msgMapiMain.cpp
new file mode 100644
index 000000000..adb5cc14c
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiMain.cpp
@@ -0,0 +1,306 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <mapidefs.h>
+#include <mapi.h>
+
+#include "msgCore.h"
+#include "nsComposeStrings.h"
+#include "msgMapiMain.h"
+#include "nsIServiceManager.h"
+#include "nsCOMPtr.h"
+
+nsMAPIConfiguration *nsMAPIConfiguration::m_pSelfRef = nullptr;
+uint32_t nsMAPIConfiguration::session_generator = 0;
+uint32_t nsMAPIConfiguration::sessionCount = 0;
+
+nsMAPIConfiguration *nsMAPIConfiguration::GetMAPIConfiguration()
+{
+  if (m_pSelfRef == nullptr)
+    m_pSelfRef = new nsMAPIConfiguration();
+
+  return m_pSelfRef;
+}
+
+nsMAPIConfiguration::nsMAPIConfiguration()
+: m_nMaxSessions(MAX_SESSIONS)
+{
+  m_Lock = PR_NewLock();
+}
+
+nsMAPIConfiguration::~nsMAPIConfiguration()
+{
+  if (m_Lock)
+    PR_DestroyLock(m_Lock);
+}
+
+void nsMAPIConfiguration::OpenConfiguration()
+{
+  // No. of max. sessions is set to MAX_SESSIONS.  In future
+  // if it is decided to have configuration (registry)
+  // parameter, this function can be used to set the
+  // max sessions;
+
+  return;
+}
+
+int16_t nsMAPIConfiguration::RegisterSession(uint32_t aHwnd,
+                const char16_t *aUserName, const char16_t *aPassword,
+                bool aForceDownLoad, bool aNewSession,
+                uint32_t *aSession, const char *aIdKey)
+{
+  int16_t nResult = 0;
+  uint32_t n_SessionId = 0;
+
+  PR_Lock(m_Lock);
+
+  // Check whether max sessions is exceeded
+
+  if (sessionCount >= m_nMaxSessions)
+  {
+    PR_Unlock(m_Lock);
+    return -1;
+  }
+
+  if (aUserName != nullptr && aUserName[0] != '\0')
+    m_ProfileMap.Get(nsDependentString(aUserName), &n_SessionId);
+
+  // try to share a session; if not create a session
+  if (n_SessionId > 0)
+  {
+    nsMAPISession *pTemp = nullptr;
+    m_SessionMap.Get(n_SessionId, &pTemp);
+    if (pTemp != nullptr)
+    {
+      pTemp->IncrementSession();
+      *aSession = n_SessionId;
+      nResult = 1;
+    }
+  }
+  else if (aNewSession || n_SessionId == 0) // checking for n_SessionId is a concession
+  {
+    // create a new session; if new session is specified OR there is no session
+    nsMAPISession *pTemp = nullptr;
+    pTemp = new nsMAPISession(aHwnd, aUserName,
+                           aPassword, aForceDownLoad, aIdKey);
+
+    if (pTemp != nullptr)
+    {
+      session_generator++;
+
+      // I don't think there will be (2 power 32) sessions alive
+      // in a cycle.  This is an assumption
+
+      if (session_generator == 0)
+          session_generator++;
+      m_SessionMap.Put(session_generator, pTemp);
+      if (aUserName != nullptr && aUserName[0] != '\0')
+        m_ProfileMap.Put(nsDependentString(aUserName), session_generator);
+      *aSession = session_generator;
+      sessionCount++;
+      nResult = 1;
+    }
+  }
+
+  PR_Unlock(m_Lock);
+  return nResult;
+}
+
+bool nsMAPIConfiguration::UnRegisterSession(uint32_t aSessionID)
+{
+  bool bResult = false;
+
+  PR_Lock(m_Lock);
+
+  if (aSessionID != 0)
+  {
+    nsMAPISession *pTemp = nullptr;
+    m_SessionMap.Get(aSessionID, &pTemp);
+
+    if (pTemp != nullptr)
+    {
+      if (pTemp->DecrementSession() == 0)
+      {
+        if (pTemp->m_pProfileName.get() != nullptr)
+          m_ProfileMap.Remove(pTemp->m_pProfileName);
+        m_SessionMap.Remove(aSessionID);
+        sessionCount--;
+        bResult = true;
+      }
+    }
+  }
+
+  PR_Unlock(m_Lock);
+  return bResult;
+}
+
+bool nsMAPIConfiguration::IsSessionValid(uint32_t aSessionID)
+{
+  if (aSessionID == 0)
+    return false;
+  bool retValue = false;
+  PR_Lock(m_Lock);
+  retValue = m_SessionMap.Get(aSessionID, NULL);
+  PR_Unlock(m_Lock);
+  return retValue;
+}
+
+char16_t *nsMAPIConfiguration::GetPassword(uint32_t aSessionID)
+{
+  char16_t *pResult = nullptr;
+
+  PR_Lock(m_Lock);
+
+  if (aSessionID != 0)
+  {
+    nsMAPISession *pTemp = nullptr;
+    m_SessionMap.Get(aSessionID, &pTemp);
+
+    if (pTemp)
+      pResult = pTemp->GetPassword();
+  }
+  PR_Unlock(m_Lock);
+  return pResult;
+}
+
+void *nsMAPIConfiguration::GetMapiListContext(uint32_t aSessionID)
+{
+  void *pResult = nullptr;
+
+  PR_Lock(m_Lock);
+
+  if (aSessionID != 0)
+  {
+    nsMAPISession *pTemp = nullptr;
+    m_SessionMap.Get(aSessionID, &pTemp);
+    if (pTemp)
+      pResult = pTemp->GetMapiListContext();
+  }
+
+  PR_Unlock(m_Lock);
+  return pResult;
+}
+
+void nsMAPIConfiguration::SetMapiListContext(uint32_t aSessionID, void *mapiListContext)
+{
+  PR_Lock(m_Lock);
+
+  if (aSessionID != 0)
+  {
+    nsMAPISession *pTemp = nullptr;
+    m_SessionMap.Get(aSessionID, &pTemp);
+    if (pTemp)
+      pTemp->SetMapiListContext(mapiListContext);
+  }
+
+  PR_Unlock(m_Lock);
+}
+
+void nsMAPIConfiguration::GetIdKey(uint32_t aSessionID, nsCString& aKey)
+{
+  PR_Lock(m_Lock);
+  if (aSessionID != 0)
+  {
+    nsMAPISession *pTemp = nullptr;
+    m_SessionMap.Get(aSessionID, &pTemp);
+    if (pTemp)
+      pTemp->GetIdKey(aKey);
+  }
+  PR_Unlock(m_Lock);
+  return;
+}
+
+// util func
+HRESULT nsMAPIConfiguration::GetMAPIErrorFromNSError (nsresult res)
+{
+  HRESULT hr = SUCCESS_SUCCESS;
+
+  if (NS_SUCCEEDED (res)) return hr;
+
+  // if failure return the related MAPI failure code
+  switch (res)
+  {
+    case NS_MSG_NO_RECIPIENTS :
+      hr = MAPI_E_BAD_RECIPTYPE;
+      break;
+    case NS_ERROR_COULD_NOT_GET_USERS_MAIL_ADDRESS :
+      hr = MAPI_E_INVALID_RECIPS;
+      break;
+    case NS_ERROR_SMTP_AUTH_FAILURE :
+    case NS_ERROR_SMTP_AUTH_GSSAPI :
+    case NS_ERROR_SMTP_AUTH_MECH_NOT_SUPPORTED :
+    case NS_ERROR_SMTP_AUTH_NOT_SUPPORTED :
+    case NS_ERROR_SMTP_AUTH_CHANGE_ENCRYPT_TO_PLAIN_NO_SSL :
+    case NS_ERROR_SMTP_AUTH_CHANGE_ENCRYPT_TO_PLAIN_SSL :
+    case NS_ERROR_SMTP_AUTH_CHANGE_PLAIN_TO_ENCRYPT :
+      hr = MAPI_E_LOGIN_FAILURE;
+      break;
+    case NS_MSG_UNABLE_TO_OPEN_FILE :
+    case NS_MSG_UNABLE_TO_OPEN_TMP_FILE :
+    case NS_MSG_COULDNT_OPEN_FCC_FOLDER :
+    case NS_ERROR_FILE_INVALID_PATH :
+      hr = MAPI_E_ATTACHMENT_OPEN_FAILURE;
+      break;
+    case NS_ERROR_FILE_TARGET_DOES_NOT_EXIST :
+      hr = MAPI_E_ATTACHMENT_NOT_FOUND;
+      break;
+    case NS_MSG_CANCELLING :
+      hr = MAPI_E_USER_ABORT;
+      break;
+    case NS_MSG_ERROR_WRITING_FILE :
+    case NS_MSG_UNABLE_TO_SAVE_TEMPLATE :
+    case NS_MSG_UNABLE_TO_SAVE_DRAFT :
+      hr = MAPI_E_ATTACHMENT_WRITE_FAILURE;
+      break;
+    default:
+      hr = MAPI_E_FAILURE;
+      break;
+  }
+
+  return hr;
+}
+
+
+nsMAPISession::nsMAPISession(uint32_t aHwnd, const char16_t *aUserName,
+                             const char16_t *aPassword, 
+                             bool aForceDownLoad, const char *aKey)
+: m_bIsForcedDownLoad(aForceDownLoad),
+  m_hAppHandle(aHwnd),
+  m_nShared(1),
+  m_pIdKey(aKey)
+{
+  m_listContext = NULL;
+  m_pProfileName.Assign(aUserName);
+  m_pPassword.Assign(aPassword);
+}
+
+nsMAPISession::~nsMAPISession()
+{
+}
+
+uint32_t nsMAPISession::IncrementSession()
+{
+  return ++m_nShared;
+}
+
+uint32_t nsMAPISession::DecrementSession()
+{
+  return --m_nShared;
+}
+
+uint32_t nsMAPISession::GetSessionCount()
+{
+  return m_nShared;
+}
+
+char16_t *nsMAPISession::GetPassword()
+{
+  return (char16_t *)m_pPassword.get();
+}
+
+void nsMAPISession::GetIdKey(nsCString& aKey)
+{
+  aKey = m_pIdKey;
+  return;
+}
diff --git a/mailnews/mapi/mapihook/src/msgMapiMain.h b/mailnews/mapi/mapihook/src/msgMapiMain.h
new file mode 100644
index 000000000..be74c5db1
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiMain.h
@@ -0,0 +1,86 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MSG_MAPI_MAIN_H_
+#define NSG_MAPI_MAIN_H_
+
+#define        MAX_NAME_LEN    256
+#define        MAX_PW_LEN      256
+#define        MAX_SESSIONS    50
+#define        MAPI_SENDCOMPLETE_EVENT   "SendCompletionEvent"
+
+#define MAPI_PROPERTIES_CHROME "chrome://messenger-mapi/locale/mapi.properties"
+#define PREF_MAPI_WARN_PRIOR_TO_BLIND_SEND "mapi.blind-send.warn"
+#define PREF_MAPI_BLIND_SEND_ENABLED "mapi.blind-send.enabled"
+
+#include "nspr.h"
+#include "nsDataHashtable.h"
+#include "nsClassHashtable.h"
+#include "nsStringGlue.h"
+
+class nsMAPISession;
+
+class nsMAPIConfiguration
+{
+private :
+
+  static uint32_t session_generator;
+  static uint32_t sessionCount;
+  static nsMAPIConfiguration *m_pSelfRef;
+  PRLock *m_Lock;
+  uint32_t  m_nMaxSessions;
+
+  nsDataHashtable<nsStringHashKey, uint32_t> m_ProfileMap;
+  nsClassHashtable<nsUint32HashKey, nsMAPISession> m_SessionMap;
+  nsMAPIConfiguration();
+  ~nsMAPIConfiguration();
+
+public :
+  static nsMAPIConfiguration *GetMAPIConfiguration();
+  void OpenConfiguration();
+  int16_t RegisterSession(uint32_t aHwnd, const char16_t *aUserName, \
+                          const char16_t *aPassword, bool aForceDownLoad, \
+                          bool aNewSession, uint32_t *aSession, const char *aIdKey);
+  bool IsSessionValid(uint32_t aSessionID);
+  bool UnRegisterSession(uint32_t aSessionID);
+  char16_t *GetPassword(uint32_t aSessionID);
+  void GetIdKey(uint32_t aSessionID, nsCString& aKey);
+  void *GetMapiListContext(uint32_t aSessionID);
+  void SetMapiListContext(uint32_t aSessionID, void *mapiListContext);
+
+  // a util func
+  static HRESULT GetMAPIErrorFromNSError (nsresult res) ;
+};
+
+class nsMAPISession
+{
+  friend class nsMAPIConfiguration;
+
+  private :
+    bool     m_bIsForcedDownLoad;
+    bool     m_bApp_or_Service;
+    uint32_t m_hAppHandle;
+    uint32_t m_nShared;
+    nsCString m_pIdKey;
+    nsString m_pProfileName;
+    nsString m_pPassword;
+    int32_t m_messageIndex;
+    void   *m_listContext; // used by findNext
+
+  public :
+    nsMAPISession(uint32_t aHwnd, const char16_t *aUserName, \
+                  const char16_t *aPassword, \
+                  bool aForceDownLoad, const char *aKey);
+    uint32_t IncrementSession();
+    uint32_t DecrementSession();
+    uint32_t GetSessionCount();
+    char16_t *nsMAPISession::GetPassword();
+    void GetIdKey(nsCString& aKey);
+    ~nsMAPISession();
+    // For enumerating Messages...
+    void SetMapiListContext( void *listContext) { m_listContext = listContext; } 
+    void *GetMapiListContext( ) { return m_listContext; }
+};
+
+#endif    // MSG_MAPI_MAIN_H_
diff --git a/mailnews/mapi/mapihook/src/msgMapiSupport.cpp b/mailnews/mapi/mapihook/src/msgMapiSupport.cpp
new file mode 100644
index 000000000..5c57f087d
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiSupport.cpp
@@ -0,0 +1,151 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "nsCOMPtr.h"
+#include "objbase.h"
+#include "nsISupports.h"
+
+#include "mozilla/ModuleUtils.h"
+#include "mozilla/Services.h"
+#include "nsIObserverService.h"
+#include "nsIAppStartupNotifier.h"
+#include "nsIServiceManager.h"
+#include "nsIComponentManager.h"
+#include "nsICategoryManager.h"
+#include "Registry.h"
+#include "msgMapiSupport.h"
+
+#include "msgMapiImp.h"
+
+/** Implementation of the nsIMapiSupport interface.
+ *  Use standard implementation of nsISupports stuff.
+ */
+
+NS_IMPL_ISUPPORTS(nsMapiSupport, nsIMapiSupport, nsIObserver)
+
+NS_IMETHODIMP
+nsMapiSupport::Observe(nsISupports *aSubject, const char *aTopic, const char16_t *aData)
+{
+    nsresult rv = NS_OK ;
+
+    if (!strcmp(aTopic, "profile-after-change"))
+        return InitializeMAPISupport();
+
+    if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID))
+        return ShutdownMAPISupport();
+
+    nsCOMPtr<nsIObserverService> observerService =
+      mozilla::services::GetObserverService();
+    NS_ENSURE_TRUE(observerService, NS_ERROR_UNEXPECTED);
+ 
+    rv = observerService->AddObserver(this,"profile-after-change", false);
+    if (NS_FAILED(rv)) return rv;
+
+    rv = observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
+    if (NS_FAILED(rv))  return rv;
+
+    return rv;
+}
+
+
+nsMapiSupport::nsMapiSupport()
+: m_dwRegister(0),
+  m_nsMapiFactory(nullptr)
+{
+}
+
+nsMapiSupport::~nsMapiSupport()
+{
+}
+
+NS_IMETHODIMP
+nsMapiSupport::InitializeMAPISupport()
+{
+    ::OleInitialize(nullptr) ;
+
+    if (m_nsMapiFactory == nullptr)    // No Registering if already done.  Sanity Check!!
+    {
+        m_nsMapiFactory = new CMapiFactory();
+
+        if (m_nsMapiFactory != nullptr)
+        {
+            HRESULT hr = ::CoRegisterClassObject(CLSID_CMapiImp, \
+                                                 m_nsMapiFactory, \
+                                                 CLSCTX_LOCAL_SERVER, \
+                                                 REGCLS_MULTIPLEUSE, \
+                                                 &m_dwRegister);
+
+            if (FAILED(hr))
+            {
+                m_nsMapiFactory->Release() ;
+                m_nsMapiFactory = nullptr;
+                return NS_ERROR_FAILURE;
+            }
+        }
+    }
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsMapiSupport::ShutdownMAPISupport()
+{
+    if (m_dwRegister != 0)
+        ::CoRevokeClassObject(m_dwRegister);
+
+    if (m_nsMapiFactory != nullptr)
+    {
+        m_nsMapiFactory->Release();
+        m_nsMapiFactory = nullptr;
+    }
+
+    ::OleUninitialize();
+
+    return NS_OK ;
+}
+
+NS_IMETHODIMP
+nsMapiSupport::RegisterServer()
+{
+  // TODO: Figure out what kind of error propogation to pass back
+  ::RegisterServer(CLSID_CMapiImp, "Mozilla MAPI", "MozillaMapi", "MozillaMapi.1");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsMapiSupport::UnRegisterServer()
+{
+  // TODO: Figure out what kind of error propogation to pass back
+  ::UnregisterServer(CLSID_CMapiImp, "MozillaMapi", "MozillaMapi.1");
+  return NS_OK;
+}
+
+NS_DEFINE_NAMED_CID(NS_IMAPISUPPORT_CID);
+
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsMapiSupport)
+
+static const mozilla::Module::CategoryEntry kMAPICategories[] = {
+  { APPSTARTUP_CATEGORY, "Mapi Support", "service," NS_IMAPISUPPORT_CONTRACTID, },
+  { NULL }
+};
+
+const mozilla::Module::CIDEntry kMAPICIDs[] = {
+  { &kNS_IMAPISUPPORT_CID, false, NULL, nsMapiSupportConstructor },
+  { NULL }
+};
+
+const mozilla::Module::ContractIDEntry kMAPIContracts[] = {
+  { NS_IMAPISUPPORT_CONTRACTID, &kNS_IMAPISUPPORT_CID },
+  { NULL }
+};
+
+static const mozilla::Module kMAPIModule = {
+    mozilla::Module::kVersion,
+    kMAPICIDs,
+    kMAPIContracts,
+    kMAPICategories
+};
+
+NSMODULE_DEFN(msgMapiModule) = &kMAPIModule;
+
+
diff --git a/mailnews/mapi/mapihook/src/msgMapiSupport.h b/mailnews/mapi/mapihook/src/msgMapiSupport.h
new file mode 100644
index 000000000..ff7ffca9f
--- /dev/null
+++ b/mailnews/mapi/mapihook/src/msgMapiSupport.h
@@ -0,0 +1,34 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MSG_MAPI_SUPPORT_H_
+#define MSG_MAPI_SUPPORT_H_
+
+#include "nsIObserver.h"
+#include "nsIMapiSupport.h"
+#include "msgMapiFactory.h"
+
+#define NS_IMAPISUPPORT_CID \
+  {0x8967fed2, 0xc8bb, 0x11d5, \
+    { 0xa3, 0xe9, 0x00, 0xb0, 0xd0, 0xf3, 0xba, 0xa7 }}
+
+class nsMapiSupport : public nsIMapiSupport,
+                      public nsIObserver
+{
+    public :
+        nsMapiSupport();
+
+        // Declare all interface methods we must implement.
+        NS_DECL_THREADSAFE_ISUPPORTS
+        NS_DECL_NSIOBSERVER
+        NS_DECL_NSIMAPISUPPORT
+
+    private :
+        ~nsMapiSupport();
+
+        DWORD   m_dwRegister;
+        CMapiFactory *m_nsMapiFactory;
+};
+
+#endif  // MSG_MAPI_SUPPORT_H_