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

1 files changed, 3382 insertions, 0 deletions

diff --git a/mailnews/imap/src/nsImapIncomingServer.cpp b/mailnews/imap/src/nsImapIncomingServer.cpp
new file mode 100644
index 000000000..77a34985b
--- /dev/null
+++ b/mailnews/imap/src/nsImapIncomingServer.cpp
@@ -0,0 +1,3382 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "msgCore.h"
+#include "nsMsgImapCID.h"
+
+#include "netCore.h"
+#include "nsIMAPHostSessionList.h"
+#include "nsImapIncomingServer.h"
+#include "nsIMsgAccountManager.h"
+#include "nsIMsgIdentity.h"
+#include "nsIImapUrl.h"
+#include "nsIUrlListener.h"
+#include "nsThreadUtils.h"
+#include "nsImapProtocol.h"
+#include "nsCOMPtr.h"
+#include "nsIPrefBranch.h"
+#include "nsIPrefService.h"
+#include "nsMsgFolderFlags.h"
+#include "prmem.h"
+#include "plstr.h"
+#include "nsIMsgFolder.h"
+#include "nsIMsgWindow.h"
+#include "nsImapMailFolder.h"
+#include "nsImapUtils.h"
+#include "nsIRDFService.h"
+#include "nsRDFCID.h"
+#include "nsIMsgMailNewsUrl.h"
+#include "nsIImapService.h"
+#include "nsMsgI18N.h"
+#include "nsIImapMockChannel.h"
+// for the memory cache...
+#include "nsICacheEntry.h"
+#include "nsImapUrl.h"
+#include "nsIMsgProtocolInfo.h"
+#include "nsIMsgMailSession.h"
+#include "nsIMAPNamespace.h"
+#include "nsArrayUtils.h"
+#include "nsITimer.h"
+#include "nsMsgUtils.h"
+#include "nsServiceManagerUtils.h"
+#include "nsComponentManagerUtils.h"
+#include "nsCRTGlue.h"
+#include "mozilla/Services.h"
+
+using namespace mozilla;
+
+#define PREF_TRASH_FOLDER_NAME "trash_folder_name"
+#define DEFAULT_TRASH_FOLDER_NAME "Trash"
+
+static NS_DEFINE_CID(kImapProtocolCID, NS_IMAPPROTOCOL_CID);
+static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
+static NS_DEFINE_CID(kSubscribableServerCID, NS_SUBSCRIBABLESERVER_CID);
+static NS_DEFINE_CID(kCImapHostSessionListCID, NS_IIMAPHOSTSESSIONLIST_CID);
+
+NS_IMPL_ADDREF_INHERITED(nsImapIncomingServer, nsMsgIncomingServer)
+NS_IMPL_RELEASE_INHERITED(nsImapIncomingServer, nsMsgIncomingServer)
+
+NS_INTERFACE_MAP_BEGIN(nsImapIncomingServer)
+  NS_INTERFACE_MAP_ENTRY(nsIImapServerSink)
+  NS_INTERFACE_MAP_ENTRY(nsIImapIncomingServer)
+  NS_INTERFACE_MAP_ENTRY(nsISubscribableServer)
+  NS_INTERFACE_MAP_ENTRY(nsIUrlListener)
+NS_INTERFACE_MAP_END_INHERITING(nsMsgIncomingServer)
+
+nsImapIncomingServer::nsImapIncomingServer()
+  : mLock("nsImapIncomingServer.mLock")
+{
+  m_capability = kCapabilityUndefined;
+  mDoingSubscribeDialog = false;
+  mDoingLsub = false;
+  m_canHaveFilters = true;
+  m_userAuthenticated = false;
+  m_shuttingDown = false;
+}
+
+nsImapIncomingServer::~nsImapIncomingServer()
+{
+  mozilla::DebugOnly<nsresult> rv = ClearInner();
+  NS_ASSERTION(NS_SUCCEEDED(rv), "ClearInner failed");
+  CloseCachedConnections();
+}
+
+NS_IMETHODIMP nsImapIncomingServer::SetKey(const nsACString& aKey)  // override nsMsgIncomingServer's implementation...
+{
+  nsMsgIncomingServer::SetKey(aKey);
+
+  // okay now that the key has been set, we need to add ourselves to the
+  // host session list...
+
+  // every time we create an imap incoming server, we need to add it to the
+  // host session list!!
+
+  nsresult rv;
+  nsCOMPtr<nsIImapHostSessionList> hostSession = do_GetService(kCImapHostSessionListCID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCString key(aKey);
+  hostSession->AddHostToList(key.get(), this);
+  nsMsgImapDeleteModel deleteModel = nsMsgImapDeleteModels::MoveToTrash; // default to trash
+  GetDeleteModel(&deleteModel);
+  hostSession->SetDeleteIsMoveToTrashForHost(key.get(), deleteModel == nsMsgImapDeleteModels::MoveToTrash);
+  hostSession->SetShowDeletedMessagesForHost(key.get(), deleteModel == nsMsgImapDeleteModels::IMAPDelete);
+
+  nsAutoCString onlineDir;
+  rv = GetServerDirectory(onlineDir);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (!onlineDir.IsEmpty())
+    hostSession->SetOnlineDirForHost(key.get(), onlineDir.get());
+
+  nsCString personalNamespace;
+  nsCString publicNamespace;
+  nsCString otherUsersNamespace;
+
+  rv = GetPersonalNamespace(personalNamespace);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = GetPublicNamespace(publicNamespace);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = GetOtherUsersNamespace(otherUsersNamespace);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (personalNamespace.IsEmpty() && publicNamespace.IsEmpty() && otherUsersNamespace.IsEmpty())
+      personalNamespace.AssignLiteral("\"\"");
+
+  hostSession->SetNamespaceFromPrefForHost(key.get(), personalNamespace.get(),
+                                           kPersonalNamespace);
+
+  if (!publicNamespace.IsEmpty())
+      hostSession->SetNamespaceFromPrefForHost(key.get(), publicNamespace.get(),
+                                               kPublicNamespace);
+
+  if (!otherUsersNamespace.IsEmpty())
+      hostSession->SetNamespaceFromPrefForHost(key.get(), otherUsersNamespace.get(),
+                                               kOtherUsersNamespace);
+  return rv;
+}
+
+// construct the pretty name to show to the user if they haven't
+// specified one. This should be overridden for news and mail.
+NS_IMETHODIMP
+nsImapIncomingServer::GetConstructedPrettyName(nsAString& retval)
+{
+  nsAutoCString username;
+  nsAutoCString hostName;
+  nsresult rv;
+
+  nsCOMPtr<nsIMsgAccountManager> accountManager =
+           do_GetService(NS_MSGACCOUNTMANAGER_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCOMPtr<nsIMsgIdentity> identity;
+  rv = accountManager->GetFirstIdentityForServer(this, getter_AddRefs(identity));
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsAutoString emailAddress;
+
+  if (NS_SUCCEEDED(rv) && identity)
+  {
+    nsCString identityEmailAddress;
+    identity->GetEmail(identityEmailAddress);
+    CopyASCIItoUTF16(identityEmailAddress, emailAddress);
+  }
+  else
+  {
+    rv = GetRealUsername(username);
+    NS_ENSURE_SUCCESS(rv,rv);
+    rv = GetRealHostName(hostName);
+    NS_ENSURE_SUCCESS(rv,rv);
+    if (!username.IsEmpty() && !hostName.IsEmpty()) {
+      CopyASCIItoUTF16(username, emailAddress);
+      emailAddress.Append('@');
+      emailAddress.Append(NS_ConvertASCIItoUTF16(hostName));
+    }
+  }
+
+  return GetFormattedStringFromName(emailAddress, "imapDefaultAccountName", retval);
+}
+
+
+NS_IMETHODIMP nsImapIncomingServer::GetLocalStoreType(nsACString& type)
+{
+  type.AssignLiteral("imap");
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::GetLocalDatabaseType(nsACString& type)
+{
+  type.AssignLiteral("imap");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetServerDirectory(nsACString& serverDirectory)
+{
+  return GetCharValue("server_sub_directory", serverDirectory);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetServerDirectory(const nsACString& serverDirectory)
+{
+  nsCString serverKey;
+  nsresult rv = GetKey(serverKey);
+  if (NS_SUCCEEDED(rv))
+  {
+    nsCOMPtr<nsIImapHostSessionList> hostSession = do_GetService(kCImapHostSessionListCID, &rv);
+    if (NS_SUCCEEDED(rv))
+      hostSession->SetOnlineDirForHost(serverKey.get(), PromiseFlatCString(serverDirectory).get());
+  }
+  return SetCharValue("server_sub_directory", serverDirectory);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetOverrideNamespaces(bool *bVal)
+{
+  return GetBoolValue("override_namespaces", bVal);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetOverrideNamespaces(bool bVal)
+{
+  nsCString serverKey;
+  GetKey(serverKey);
+  if (!serverKey.IsEmpty())
+  {
+    nsresult rv;
+    nsCOMPtr<nsIImapHostSessionList> hostSession = do_GetService(kCImapHostSessionListCID, &rv);
+    if (NS_SUCCEEDED(rv))
+      hostSession->SetNamespacesOverridableForHost(serverKey.get(), bVal);
+  }
+  return SetBoolValue("override_namespaces", bVal);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetUsingSubscription(bool *bVal)
+{
+  return GetBoolValue("using_subscription", bVal);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetUsingSubscription(bool bVal)
+{
+  nsCString serverKey;
+  GetKey(serverKey);
+  if (!serverKey.IsEmpty())
+  {
+    nsresult rv;
+    nsCOMPtr<nsIImapHostSessionList> hostSession = do_GetService(kCImapHostSessionListCID, &rv);
+    if (NS_SUCCEEDED(rv))
+      hostSession->SetHostIsUsingSubscription(serverKey.get(), bVal);
+  }
+  return SetBoolValue("using_subscription", bVal);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetMaximumConnectionsNumber(int32_t *aMaxConnections)
+{
+  NS_ENSURE_ARG_POINTER(aMaxConnections);
+
+  nsresult rv = GetIntValue("max_cached_connections", aMaxConnections);
+  // Get our maximum connection count. We need at least 1. If the value is 0,
+  // we use the default of 5. If it's negative, we treat that as 1.
+  if (NS_SUCCEEDED(rv) && *aMaxConnections > 0)
+    return NS_OK;
+
+  *aMaxConnections = (NS_FAILED(rv) || (*aMaxConnections == 0)) ? 5 : 1;
+  (void)SetMaximumConnectionsNumber(*aMaxConnections);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetMaximumConnectionsNumber(int32_t aMaxConnections)
+{
+  return SetIntValue("max_cached_connections", aMaxConnections);
+}
+
+NS_IMPL_SERVERPREF_STR(nsImapIncomingServer, ForceSelect,
+                       "force_select")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, DualUseFolders,
+                        "dual_use_folders")
+
+NS_IMPL_SERVERPREF_STR(nsImapIncomingServer, AdminUrl,
+                       "admin_url")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, CleanupInboxOnExit,
+                        "cleanup_inbox_on_exit")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, OfflineDownload,
+                        "offline_download")
+
+NS_IMPL_SERVERPREF_INT(nsImapIncomingServer, EmptyTrashThreshhold,
+                       "empty_trash_threshhold")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, DownloadBodiesOnGetNewMail,
+                        "download_bodies_on_get_new_mail")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, AutoSyncOfflineStores,
+                        "autosync_offline_stores")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, UseIdle,
+                        "use_idle")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, CheckAllFoldersForNew,
+                        "check_all_folders_for_new")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, UseCondStore,
+                        "use_condstore")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, IsGMailServer,
+                        "is_gmail")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, UseCompressDeflate,
+                        "use_compress_deflate")
+
+NS_IMPL_SERVERPREF_INT(nsImapIncomingServer, AutoSyncMaxAgeDays,
+                        "autosync_max_age_days")
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetShuttingDown(bool *retval)
+{
+  NS_ENSURE_ARG_POINTER(retval);
+  *retval = m_shuttingDown;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetShuttingDown(bool val)
+{
+  m_shuttingDown = val;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetDeleteModel(int32_t *retval)
+{
+  NS_ENSURE_ARG(retval);
+  return GetIntValue("delete_model", retval);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetDeleteModel(int32_t ivalue)
+{
+  nsresult rv = SetIntValue("delete_model", ivalue);
+  if (NS_SUCCEEDED(rv))
+  {
+    nsCOMPtr<nsIImapHostSessionList> hostSession =
+        do_GetService(kCImapHostSessionListCID, &rv);
+    NS_ENSURE_SUCCESS(rv,rv);
+    hostSession->SetDeleteIsMoveToTrashForHost(m_serverKey.get(), ivalue == nsMsgImapDeleteModels::MoveToTrash);
+    hostSession->SetShowDeletedMessagesForHost(m_serverKey.get(), ivalue == nsMsgImapDeleteModels::IMAPDelete);
+
+    nsAutoString trashFolderName;
+    nsresult rv = GetTrashFolderName(trashFolderName);
+    if (NS_SUCCEEDED(rv))
+    {
+      nsAutoCString trashFolderNameUtf7;
+      rv = CopyUTF16toMUTF7(trashFolderName, trashFolderNameUtf7);
+      if (NS_SUCCEEDED(rv))
+      {
+        nsCOMPtr<nsIMsgFolder> trashFolder;
+        // XXX GetFolder only returns folders one level below root.
+        //     trashFolderName is a leaf name. So this will not find INBOX.Trash
+        rv = GetFolder(trashFolderNameUtf7, getter_AddRefs(trashFolder));
+        NS_ENSURE_SUCCESS(rv, rv);
+        nsCString trashURI;
+        trashFolder->GetURI(trashURI);
+        GetMsgFolderFromURI(trashFolder, trashURI, getter_AddRefs(trashFolder));
+        if (NS_SUCCEEDED(rv) && trashFolder)
+        {
+           // If the trash folder is used, set the flag, otherwise clear it.
+          if (ivalue == nsMsgImapDeleteModels::MoveToTrash)
+            trashFolder->SetFlag(nsMsgFolderFlags::Trash);
+          else
+            trashFolder->ClearFlag(nsMsgFolderFlags::Trash);
+        }
+      }
+    }
+  }
+  return rv;
+}
+
+NS_IMPL_SERVERPREF_INT(nsImapIncomingServer, TimeOutLimits,
+                       "timeout")
+
+NS_IMPL_SERVERPREF_STR(nsImapIncomingServer, ServerIDPref,
+                       "serverIDResponse")
+
+NS_IMPL_SERVERPREF_STR(nsImapIncomingServer, PersonalNamespace,
+                       "namespace.personal")
+
+NS_IMPL_SERVERPREF_STR(nsImapIncomingServer, PublicNamespace,
+                       "namespace.public")
+
+NS_IMPL_SERVERPREF_STR(nsImapIncomingServer, OtherUsersNamespace,
+                       "namespace.other_users")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, FetchByChunks,
+                       "fetch_by_chunks")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, MimePartsOnDemand,
+                       "mime_parts_on_demand")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, SendID,
+                       "send_client_info")
+
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, CapabilityACL,
+                       "cacheCapa.acl")
+NS_IMPL_SERVERPREF_BOOL(nsImapIncomingServer, CapabilityQuota,
+                       "cacheCapa.quota")
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetIsAOLServer(bool *aBool)
+{
+  NS_ENSURE_ARG_POINTER(aBool);
+  *aBool = ((m_capability & kAOLImapCapability) != 0);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetIsAOLServer(bool aBool)
+{
+  if (aBool)
+    m_capability |= kAOLImapCapability;
+  else
+    m_capability &= ~kAOLImapCapability;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::UpdateTrySTARTTLSPref(bool aStartTLSSucceeded)
+{
+  SetSocketType(aStartTLSSucceeded ? nsMsgSocketType::alwaysSTARTTLS :
+                                     nsMsgSocketType::plain);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetImapConnectionAndLoadUrl(nsIImapUrl* aImapUrl,
+                                                  nsISupports* aConsumer)
+{
+  nsCOMPtr<nsIImapProtocol> aProtocol;
+
+  nsresult rv = GetImapConnection(aImapUrl, getter_AddRefs(aProtocol));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIMsgMailNewsUrl> mailnewsurl = do_QueryInterface(aImapUrl, &rv);
+  if (aProtocol)
+  {
+    rv = aProtocol->LoadImapUrl(mailnewsurl, aConsumer);
+    // *** jt - in case of the time out situation or the connection gets
+    // terminated by some unforseen problems let's give it a second chance
+    // to run the url
+    if (NS_FAILED(rv) && rv != NS_ERROR_ILLEGAL_VALUE)
+    {
+      NS_ASSERTION(false, "shouldn't get an error loading url");
+      rv = aProtocol->LoadImapUrl(mailnewsurl, aConsumer);
+    }
+  }
+  else
+  {   // unable to get an imap connection to run the url; add to the url
+     // queue
+    nsImapProtocol::LogImapUrl("queuing url", aImapUrl);
+    PR_CEnterMonitor(this);
+    m_urlQueue.AppendObject(aImapUrl);
+    m_urlConsumers.AppendElement(aConsumer);
+    NS_IF_ADDREF(aConsumer);
+    PR_CExitMonitor(this);
+    // let's try running it now - maybe the connection is free now.
+    bool urlRun;
+    rv = LoadNextQueuedUrl(nullptr, &urlRun);
+  }
+
+  return rv;
+}
+
+
+NS_IMETHODIMP
+nsImapIncomingServer::PrepareToRetryUrl(nsIImapUrl *aImapUrl, nsIImapMockChannel **aChannel)
+{
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aImapUrl);
+  // maybe there's more we could do here, but this is all we need now.
+  return aImapUrl->GetMockChannel(aChannel);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SuspendUrl(nsIImapUrl *aImapUrl)
+{
+  NS_ENSURE_ARG_POINTER(aImapUrl);
+  nsImapProtocol::LogImapUrl("suspending url", aImapUrl);
+  PR_CEnterMonitor(this);
+  m_urlQueue.AppendObject(aImapUrl);
+  m_urlConsumers.AppendElement(nullptr);
+  PR_CExitMonitor(this);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::RetryUrl(nsIImapUrl *aImapUrl, nsIImapMockChannel *aChannel)
+{
+  nsresult rv;
+  // Get current thread envent queue
+  aImapUrl->SetMockChannel(aChannel);
+  nsCOMPtr <nsIImapProtocol> protocolInstance;
+  nsImapProtocol::LogImapUrl("creating protocol instance to retry queued url", aImapUrl);
+  nsCOMPtr<nsIThread> thread(do_GetCurrentThread());
+  rv = GetImapConnection(aImapUrl, getter_AddRefs(protocolInstance));
+  if (NS_SUCCEEDED(rv) && protocolInstance)
+  {
+    nsCOMPtr<nsIURI> url = do_QueryInterface(aImapUrl, &rv);
+    if (NS_SUCCEEDED(rv) && url)
+    {
+      nsImapProtocol::LogImapUrl("retrying  url", aImapUrl);
+      rv = protocolInstance->LoadImapUrl(url, nullptr); // ### need to save the display consumer.
+      NS_ASSERTION(NS_SUCCEEDED(rv), "failed running queued url");
+    }
+  }
+  return rv;
+}
+
+// checks to see if there are any queued urls on this incoming server,
+// and if so, tries to run the oldest one. Returns true if the url is run
+// on the passed in protocol connection.
+NS_IMETHODIMP
+nsImapIncomingServer::LoadNextQueuedUrl(nsIImapProtocol *aProtocol, bool *aResult)
+{
+  if (WeAreOffline())
+    return NS_MSG_ERROR_OFFLINE;
+
+  nsresult rv = NS_OK;
+  bool urlRun = false;
+  bool keepGoing = true;
+  nsCOMPtr <nsIImapProtocol>  protocolInstance ;
+
+  MutexAutoLock mon(mLock);
+  int32_t cnt = m_urlQueue.Count();
+
+  while (cnt > 0 && !urlRun && keepGoing)
+  {
+    nsCOMPtr<nsIImapUrl> aImapUrl(m_urlQueue[0]);
+    nsCOMPtr<nsIMsgMailNewsUrl> aMailNewsUrl(do_QueryInterface(aImapUrl, &rv));
+
+    bool removeUrlFromQueue = false;
+    if (aImapUrl)
+    {
+      nsImapProtocol::LogImapUrl("considering playing queued url", aImapUrl);
+      rv = DoomUrlIfChannelHasError(aImapUrl, &removeUrlFromQueue);
+      NS_ENSURE_SUCCESS(rv, rv);
+      // if we didn't doom the url, lets run it.
+      if (!removeUrlFromQueue)
+      {
+        nsISupports *aConsumer = m_urlConsumers.ElementAt(0);
+        NS_IF_ADDREF(aConsumer);
+
+        nsImapProtocol::LogImapUrl("creating protocol instance to play queued url", aImapUrl);
+        rv = GetImapConnection(aImapUrl, getter_AddRefs(protocolInstance));
+        if (NS_SUCCEEDED(rv) && protocolInstance)
+        {
+          nsCOMPtr<nsIURI> url = do_QueryInterface(aImapUrl, &rv);
+          if (NS_SUCCEEDED(rv) && url)
+          {
+            nsImapProtocol::LogImapUrl("playing queued url", aImapUrl);
+            rv = protocolInstance->LoadImapUrl(url, aConsumer);
+            NS_ASSERTION(NS_SUCCEEDED(rv), "failed running queued url");
+            bool isInbox;
+            protocolInstance->IsBusy(&urlRun, &isInbox);
+            if (!urlRun)
+              nsImapProtocol::LogImapUrl("didn't need to run", aImapUrl);
+            removeUrlFromQueue = true;
+          }
+        }
+        else
+        {
+          nsImapProtocol::LogImapUrl("failed creating protocol instance to play queued url", aImapUrl);
+          keepGoing = false;
+        }
+        NS_IF_RELEASE(aConsumer);
+      }
+      if (removeUrlFromQueue)
+      {
+        m_urlQueue.RemoveObjectAt(0);
+        m_urlConsumers.RemoveElementAt(0);
+      }
+    }
+    cnt = m_urlQueue.Count();
+  }
+  if (aResult)
+    *aResult = urlRun && aProtocol && aProtocol == protocolInstance;
+
+  return rv;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::AbortQueuedUrls()
+{
+  nsresult rv = NS_OK;
+
+  MutexAutoLock mon(mLock);
+  int32_t cnt = m_urlQueue.Count();
+
+  while (cnt > 0)
+  {
+    nsCOMPtr<nsIImapUrl> aImapUrl(m_urlQueue[cnt - 1]);
+    bool removeUrlFromQueue = false;
+
+    if (aImapUrl)
+    {
+      rv = DoomUrlIfChannelHasError(aImapUrl, &removeUrlFromQueue);
+      NS_ENSURE_SUCCESS(rv, rv);
+      if (removeUrlFromQueue)
+      {
+        m_urlQueue.RemoveObjectAt(cnt - 1);
+        m_urlConsumers.RemoveElementAt(cnt - 1);
+      }
+    }
+    cnt--;
+  }
+
+  return rv;
+}
+
+// if this url has a channel with an error, doom it and its mem cache entries,
+// and notify url listeners.
+nsresult nsImapIncomingServer::DoomUrlIfChannelHasError(nsIImapUrl *aImapUrl, bool *urlDoomed)
+{
+  nsresult rv = NS_OK;
+
+  nsCOMPtr<nsIMsgMailNewsUrl> aMailNewsUrl(do_QueryInterface(aImapUrl, &rv));
+
+  if (aMailNewsUrl && aImapUrl)
+  {
+    nsCOMPtr <nsIImapMockChannel> mockChannel;
+
+    if (NS_SUCCEEDED(aImapUrl->GetMockChannel(getter_AddRefs(mockChannel))) && mockChannel)
+    {
+      nsresult requestStatus;
+      nsCOMPtr<nsIRequest> request = do_QueryInterface(mockChannel);
+      if (!request)
+        return NS_ERROR_FAILURE;
+      request->GetStatus(&requestStatus);
+      if (NS_FAILED(requestStatus))
+      {
+        nsresult res;
+        *urlDoomed = true;
+        nsImapProtocol::LogImapUrl("dooming url", aImapUrl);
+
+        mockChannel->Close(); // try closing it to get channel listener nulled out.
+
+        if (aMailNewsUrl)
+        {
+          nsCOMPtr<nsICacheEntry> cacheEntry;
+          res = aMailNewsUrl->GetMemCacheEntry(getter_AddRefs(cacheEntry));
+          if (NS_SUCCEEDED(res) && cacheEntry)
+            cacheEntry->AsyncDoom(nullptr);
+          // we're aborting this url - tell listeners
+          aMailNewsUrl->SetUrlState(false, NS_MSG_ERROR_URL_ABORTED);
+        }
+      }
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::RemoveConnection(nsIImapProtocol* aImapConnection)
+{
+  PR_CEnterMonitor(this);
+  if (aImapConnection)
+    m_connectionCache.RemoveObject(aImapConnection);
+
+  PR_CExitMonitor(this);
+  return NS_OK;
+}
+
+bool
+nsImapIncomingServer::ConnectionTimeOut(nsIImapProtocol* aConnection)
+{
+  bool retVal = false;
+  if (!aConnection) return retVal;
+  nsresult rv;
+
+  int32_t timeoutInMinutes = 0;
+  rv = GetTimeOutLimits(&timeoutInMinutes);
+  if (NS_FAILED(rv) || timeoutInMinutes <= 0 || timeoutInMinutes > 29)
+  {
+    timeoutInMinutes = 29;
+    SetTimeOutLimits(timeoutInMinutes);
+  }
+
+  PRTime cacheTimeoutLimits = timeoutInMinutes * 60 * PR_USEC_PER_SEC;
+  PRTime lastActiveTimeStamp;
+  rv = aConnection->GetLastActiveTimeStamp(&lastActiveTimeStamp);
+
+  if (PR_Now() - lastActiveTimeStamp >= cacheTimeoutLimits)
+  {
+      nsCOMPtr<nsIImapProtocol> aProtocol(do_QueryInterface(aConnection,
+                                                            &rv));
+      if (NS_SUCCEEDED(rv) && aProtocol)
+      {
+        RemoveConnection(aConnection);
+        aProtocol->TellThreadToDie(false);
+        retVal = true;
+      }
+  }
+  return retVal;
+}
+
+nsresult
+nsImapIncomingServer::GetImapConnection(nsIImapUrl * aImapUrl,
+                                        nsIImapProtocol ** aImapConnection)
+{
+  NS_ENSURE_ARG_POINTER(aImapUrl);
+
+  nsresult rv = NS_OK;
+  bool canRunUrlImmediately = false;
+  bool canRunButBusy = false;
+  nsCOMPtr<nsIImapProtocol> connection;
+  nsCOMPtr<nsIImapProtocol> freeConnection;
+  bool isBusy = false;
+  bool isInboxConnection = false;
+
+  PR_CEnterMonitor(this);
+
+  int32_t maxConnections;
+  (void)GetMaximumConnectionsNumber(&maxConnections);
+
+  int32_t cnt = m_connectionCache.Count();
+
+  *aImapConnection = nullptr;
+  // iterate through the connection cache for a connection that can handle this url.
+  bool userCancelled = false;
+
+  // loop until we find a connection that can run the url, or doesn't have to wait?
+  for (int32_t i = cnt - 1; i >= 0 && !canRunUrlImmediately && !canRunButBusy; i--)
+  {
+    connection = m_connectionCache[i];
+    if (connection)
+    {
+      bool badConnection = ConnectionTimeOut(connection);
+      if (!badConnection)
+      {
+        badConnection = NS_FAILED(connection->CanHandleUrl(aImapUrl,
+                                                           &canRunUrlImmediately,
+                                                           &canRunButBusy));
+#ifdef DEBUG_bienvenu
+        nsAutoCString curSelectedFolderName;
+        if (connection)
+          connection->GetSelectedMailboxName(getter_Copies(curSelectedFolderName));
+        // check that no other connection is in the same selected state.
+        if (!curSelectedFolderName.IsEmpty())
+        {
+          for (uint32_t j = 0; j < cnt; j++)
+          {
+            if (j != i)
+            {
+              nsCOMPtr<nsIImapProtocol> otherConnection = do_QueryElementAt(m_connectionCache, j);
+              if (otherConnection)
+              {
+                nsAutoCString otherSelectedFolderName;
+                otherConnection->GetSelectedMailboxName(getter_Copies(otherSelectedFolderName));
+                NS_ASSERTION(!curSelectedFolderName.Equals(otherSelectedFolderName), "two connections selected on same folder");
+              }
+
+            }
+          }
+        }
+#endif // DEBUG_bienvenu
+      }
+      if (badConnection)
+      {
+        connection = nullptr;
+        continue;
+      }
+    }
+
+    // if this connection is wrong, but it's not busy, check if we should designate
+    // it as the free connection.
+    if (!canRunUrlImmediately && !canRunButBusy && connection)
+    {
+        rv = connection->IsBusy(&isBusy, &isInboxConnection);
+        if (NS_FAILED(rv))
+          continue;
+        // if max connections is <= 1, we have to re-use the inbox connection.
+        if (!isBusy && (!isInboxConnection || maxConnections <= 1))
+        {
+          if (!freeConnection)
+            freeConnection = connection;
+          else  // check which is the better free connection to use.
+          {     // We prefer one not in the selected state.
+            nsAutoCString selectedFolderName;
+            connection->GetSelectedMailboxName(getter_Copies(selectedFolderName));
+            if (selectedFolderName.IsEmpty())
+              freeConnection = connection;
+          }
+        }
+    }
+    // don't leave this loop with connection set if we can't use it!
+    if (!canRunButBusy && !canRunUrlImmediately)
+      connection = nullptr;
+  }
+
+  nsImapState requiredState;
+  aImapUrl->GetRequiredImapState(&requiredState);
+  // refresh cnt in case we killed one or more dead connections. This
+  // will prevent us from not spinning up a new connection when all
+  // connections were dead.
+  cnt = m_connectionCache.Count();
+  // if we got here and we have a connection, then we should return it!
+  if (canRunUrlImmediately && connection)
+  {
+    *aImapConnection = connection;
+    NS_IF_ADDREF(*aImapConnection);
+  }
+  else if (canRunButBusy)
+  {
+    // do nothing; return NS_OK; for queuing
+  }
+  else if (userCancelled)
+  {
+    rv = NS_BINDING_ABORTED;  // user cancelled
+  }
+  // CanHandleUrl will pretend that some types of urls require a selected state url
+  // (e.g., a folder delete or msg append) but we shouldn't create new connections
+  // for these types of urls if we have a free connection. So we check the actual
+  // required state here.
+  else if (cnt < maxConnections
+      && (!freeConnection || requiredState == nsIImapUrl::nsImapSelectedState))
+    rv = CreateProtocolInstance(aImapConnection);
+  else if (freeConnection)
+  {
+    *aImapConnection = freeConnection;
+    NS_IF_ADDREF(*aImapConnection);
+  }
+  else // cannot get anyone to handle the url queue it
+  {
+    if (cnt >= maxConnections)
+      nsImapProtocol::LogImapUrl("exceeded connection cache limit", aImapUrl);
+      // caller will queue the url
+  }
+
+  PR_CExitMonitor(this);
+  return rv;
+}
+
+nsresult
+nsImapIncomingServer::CreateProtocolInstance(nsIImapProtocol ** aImapConnection)
+{
+  // create a new connection and add it to the connection cache
+  // we may need to flag the protocol connection as busy so we don't get
+  // a race condition where someone else goes through this code
+
+  int32_t authMethod;
+  GetAuthMethod(&authMethod);
+  nsresult rv;
+  // pre-flight that we have nss - on the ui thread - for MD5 etc.
+  switch (authMethod)
+  {
+    case nsMsgAuthMethod::passwordEncrypted:
+    case nsMsgAuthMethod::secure:
+    case nsMsgAuthMethod::anything:
+      {
+        nsCOMPtr<nsISupports> dummyUsedToEnsureNSSIsInitialized =
+          do_GetService("@mozilla.org/psm;1", &rv);
+        NS_ENSURE_SUCCESS(rv, rv);
+      }
+      break;
+    default:
+      break;
+  }
+  nsIImapProtocol * protocolInstance;
+  rv = CallCreateInstance(kImapProtocolCID, &protocolInstance);
+  if (NS_SUCCEEDED(rv) && protocolInstance)
+  {
+    nsCOMPtr<nsIImapHostSessionList> hostSession =
+      do_GetService(kCImapHostSessionListCID, &rv);
+    if (NS_SUCCEEDED(rv))
+      rv = protocolInstance->Initialize(hostSession, this);
+  }
+
+  // take the protocol instance and add it to the connectionCache
+  if (protocolInstance)
+    m_connectionCache.AppendObject(protocolInstance);
+  *aImapConnection = protocolInstance; // this is already ref counted.
+  return rv;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::CloseConnectionForFolder(nsIMsgFolder *aMsgFolder)
+{
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIImapProtocol> connection;
+  bool isBusy = false, isInbox = false;
+  nsCString inFolderName;
+  nsCString connectionFolderName;
+  nsCOMPtr <nsIMsgImapMailFolder> imapFolder = do_QueryInterface(aMsgFolder);
+
+  if (!imapFolder)
+    return NS_ERROR_NULL_POINTER;
+
+  int32_t cnt = m_connectionCache.Count();
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  imapFolder->GetOnlineName(inFolderName);
+  PR_CEnterMonitor(this);
+
+  for (int32_t i = 0; i < cnt; ++i)
+  {
+    connection = m_connectionCache[i];
+    if (connection)
+    {
+      rv = connection->GetSelectedMailboxName(getter_Copies(connectionFolderName));
+      if (connectionFolderName.Equals(inFolderName))
+      {
+        rv = connection->IsBusy(&isBusy, &isInbox);
+        if (!isBusy)
+          rv = connection->TellThreadToDie(true);
+        break; // found it, end of the loop
+      }
+    }
+  }
+
+  PR_CExitMonitor(this);
+  return rv;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::ResetConnection(const nsACString& folderName)
+{
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIImapProtocol> connection;
+  bool isBusy = false, isInbox = false;
+  nsCString curFolderName;
+
+  int32_t cnt = m_connectionCache.Count();
+
+  PR_CEnterMonitor(this);
+
+  for (int32_t i = 0; i < cnt; ++i)
+  {
+    connection = m_connectionCache[i];
+    if (connection)
+    {
+      rv = connection->GetSelectedMailboxName(getter_Copies(curFolderName));
+      if (curFolderName.Equals(folderName))
+      {
+        rv = connection->IsBusy(&isBusy, &isInbox);
+        if (!isBusy)
+            rv = connection->ResetToAuthenticatedState();
+        break; // found it, end of the loop
+      }
+    }
+  }
+
+  PR_CExitMonitor(this);
+  return rv;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::PerformExpand(nsIMsgWindow *aMsgWindow)
+{
+  nsCString password;
+  nsresult rv;
+  rv = GetPassword(password);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (password.IsEmpty())
+    return NS_OK;
+
+  rv = ResetFoldersToUnverified(nullptr);
+
+  nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+  rv = GetRootFolder(getter_AddRefs(rootMsgFolder));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (!rootMsgFolder) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsIImapService> imapService = do_GetService(NS_IMAPSERVICE_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsCOMPtr<nsIThread> thread(do_GetCurrentThread());
+  rv = imapService->DiscoverAllFolders(rootMsgFolder,
+                                       this, aMsgWindow, nullptr);
+  return rv;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::VerifyLogon(nsIUrlListener *aUrlListener,
+                                  nsIMsgWindow *aMsgWindow, nsIURI **aURL)
+{
+  nsresult rv;
+
+  nsCOMPtr<nsIImapService> imapService = do_GetService(NS_IMAPSERVICE_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsCOMPtr<nsIMsgFolder> rootFolder;
+  // this will create the resource if it doesn't exist, but it shouldn't
+  // do anything on disk.
+  rv = GetRootFolder(getter_AddRefs(rootFolder));
+  NS_ENSURE_SUCCESS(rv, rv);
+  return imapService->VerifyLogon(rootFolder, aUrlListener, aMsgWindow, aURL);
+}
+
+NS_IMETHODIMP nsImapIncomingServer::PerformBiff(nsIMsgWindow* aMsgWindow)
+{
+  nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+  nsresult rv = GetRootMsgFolder(getter_AddRefs(rootMsgFolder));
+  if(NS_SUCCEEDED(rv))
+  {
+    SetPerformingBiff(true);
+    rv = rootMsgFolder->GetNewMessages(aMsgWindow, nullptr);
+  }
+  return rv;
+}
+
+
+NS_IMETHODIMP
+nsImapIncomingServer::CloseCachedConnections()
+{
+  nsCOMPtr<nsIImapProtocol> connection;
+  PR_CEnterMonitor(this);
+
+  // iterate through the connection cache closing open connections.
+  int32_t cnt = m_connectionCache.Count();
+
+  for (int32_t i = cnt; i > 0; --i)
+  {
+    connection = m_connectionCache[i - 1];
+    if (connection)
+      connection->TellThreadToDie(true);
+  }
+
+  PR_CExitMonitor(this);
+  return NS_OK;
+}
+
+nsresult
+nsImapIncomingServer::CreateRootFolderFromUri(const nsCString &serverUri,
+                                              nsIMsgFolder **rootFolder)
+{
+  nsImapMailFolder *newRootFolder = new nsImapMailFolder;
+  if (!newRootFolder)
+    return NS_ERROR_OUT_OF_MEMORY;
+  newRootFolder->Init(serverUri.get());
+  NS_ADDREF(*rootFolder = newRootFolder);
+  return NS_OK;
+}
+
+// nsIImapServerSink impl
+// aNewFolder will not be set if we're listing for the subscribe UI, since that's the way 4.x worked.
+NS_IMETHODIMP nsImapIncomingServer::PossibleImapMailbox(const nsACString& folderPath,
+                                                        char hierarchyDelimiter,
+                                                        int32_t boxFlags, bool *aNewFolder)
+{
+  NS_ENSURE_ARG_POINTER(aNewFolder);
+  NS_ENSURE_TRUE(!folderPath.IsEmpty(), NS_ERROR_FAILURE);
+
+  // folderPath is in canonical format, i.e., hierarchy separator has been replaced with '/'
+  nsresult rv;
+  bool found = false;
+  bool haveParent = false;
+  nsCOMPtr<nsIMsgImapMailFolder> hostFolder;
+  nsCOMPtr<nsIMsgFolder> aFolder;
+  bool explicitlyVerify = false;
+
+  *aNewFolder = false;
+  nsCOMPtr<nsIMsgFolder> a_nsIFolder;
+  rv = GetRootFolder(getter_AddRefs(a_nsIFolder));
+
+  if(NS_FAILED(rv))
+    return rv;
+
+  nsAutoCString dupFolderPath(folderPath);
+  if (dupFolderPath.Last() == '/')
+  {
+    dupFolderPath.SetLength(dupFolderPath.Length()-1);
+    if (dupFolderPath.IsEmpty())
+      return NS_ERROR_FAILURE;
+    // *** this is what we did in 4.x in order to list uw folder only
+    // mailbox in order to get the \NoSelect flag
+    explicitlyVerify = !(boxFlags & kNameSpace);
+  }
+  if (mDoingSubscribeDialog)
+  {
+    // Make sure the imapmailfolder object has the right delimiter because the unsubscribed
+    // folders (those not in the 'lsub' list) have the delimiter set to the default ('^').
+    if (a_nsIFolder && !dupFolderPath.IsEmpty())
+    {
+      nsCOMPtr<nsIMsgFolder> msgFolder;
+      bool isNamespace = false;
+      bool noSelect = false;
+
+      rv = a_nsIFolder->FindSubFolder(dupFolderPath, getter_AddRefs(msgFolder));
+      NS_ENSURE_SUCCESS(rv,rv);
+      m_subscribeFolders.AppendObject(msgFolder);
+      noSelect = (boxFlags & kNoselect) != 0;
+      nsCOMPtr<nsIMsgImapMailFolder> imapFolder = do_QueryInterface(msgFolder, &rv);
+      NS_ENSURE_SUCCESS(rv,rv);
+      imapFolder->SetHierarchyDelimiter(hierarchyDelimiter);
+      isNamespace = (boxFlags & kNameSpace) != 0;
+      if (!isNamespace)
+        rv = AddTo(dupFolderPath, mDoingLsub && !noSelect/* add as subscribed */,
+                   !noSelect, mDoingLsub /* change if exists */);
+      NS_ENSURE_SUCCESS(rv,rv);
+      return rv;
+    }
+  }
+
+  hostFolder = do_QueryInterface(a_nsIFolder, &rv);
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsAutoCString tempFolderName(dupFolderPath);
+  nsAutoCString tokenStr, remStr, changedStr;
+  int32_t slashPos = tempFolderName.FindChar('/');
+  if (slashPos > 0)
+  {
+    tokenStr = StringHead(tempFolderName, slashPos);
+    remStr = Substring(tempFolderName, slashPos);
+  }
+  else
+    tokenStr.Assign(tempFolderName);
+
+  if ((int32_t(PL_strcasecmp(tokenStr.get(), "INBOX"))==0) && (strcmp(tokenStr.get(), "INBOX") != 0))
+    changedStr.Append("INBOX");
+  else
+    changedStr.Append(tokenStr);
+
+  if (slashPos > 0 )
+    changedStr.Append(remStr);
+
+  dupFolderPath.Assign(changedStr);
+  nsAutoCString folderName(dupFolderPath);
+
+  nsAutoCString uri;
+  nsCString serverUri;
+  GetServerURI(serverUri);
+  uri.Assign(serverUri);
+  int32_t leafPos = folderName.RFindChar('/');
+  nsAutoCString parentName(folderName);
+  nsAutoCString parentUri(uri);
+
+  if (leafPos > 0)
+  {
+    // If there is a hierarchy, there is a parent.
+    // Don't strip off slash if it's the first character
+    parentName.SetLength(leafPos);
+    folderName.Cut(0, leafPos + 1);	// get rid of the parent name
+    haveParent = true;
+    parentUri.Append('/');
+    parentUri.Append(parentName);
+  }
+  if (MsgLowerCaseEqualsLiteral(folderPath, "inbox") &&
+    hierarchyDelimiter == kOnlineHierarchySeparatorNil)
+  {
+    hierarchyDelimiter = '/'; // set to default in this case (as in 4.x)
+    hostFolder->SetHierarchyDelimiter(hierarchyDelimiter);
+  }
+
+  nsCOMPtr <nsIMsgFolder> child;
+
+  // nsCString possibleName(aSpec->allocatedPathName);
+  uri.Append('/');
+  uri.Append(dupFolderPath);
+  bool caseInsensitive = MsgLowerCaseEqualsLiteral(dupFolderPath, "inbox");
+  a_nsIFolder->GetChildWithURI(uri, true, caseInsensitive, getter_AddRefs(child));
+  // if we couldn't find this folder by URI, tell the imap code it's a new folder to us
+  *aNewFolder = !child;
+  if (child)
+    found = true;
+  if (!found)
+  {
+    // trying to find/discover the parent
+    if (haveParent)
+    {
+      nsCOMPtr <nsIMsgFolder> parent;
+      bool parentIsNew;
+      caseInsensitive = MsgLowerCaseEqualsLiteral(parentName, "inbox");
+      a_nsIFolder->GetChildWithURI(parentUri, true, caseInsensitive, getter_AddRefs(parent));
+      if (!parent /* || parentFolder->GetFolderNeedsAdded()*/)
+      {
+        PossibleImapMailbox(parentName, hierarchyDelimiter, kNoselect | // be defensive
+          ((boxFlags  & //only inherit certain flags from the child
+          (kPublicMailbox | kOtherUsersMailbox | kPersonalMailbox))), &parentIsNew);
+      }
+    }
+    rv = hostFolder->CreateClientSubfolderInfo(dupFolderPath, hierarchyDelimiter,boxFlags, false);
+    NS_ENSURE_SUCCESS(rv, rv);
+    caseInsensitive = MsgLowerCaseEqualsLiteral(dupFolderPath, "inbox");
+    a_nsIFolder->GetChildWithURI(uri, true, caseInsensitive, getter_AddRefs(child));
+  }
+  if (child)
+  {
+    nsCOMPtr <nsIMsgImapMailFolder> imapFolder = do_QueryInterface(child);
+    if (imapFolder)
+    {
+      nsAutoCString onlineName;
+      nsAutoString unicodeName;
+      imapFolder->SetVerifiedAsOnlineFolder(true);
+      imapFolder->SetHierarchyDelimiter(hierarchyDelimiter);
+      if (boxFlags & kImapTrash)
+      {
+        int32_t deleteModel;
+        GetDeleteModel(&deleteModel);
+        if (deleteModel == nsMsgImapDeleteModels::MoveToTrash)
+          child->SetFlag(nsMsgFolderFlags::Trash);
+      }
+
+      imapFolder->SetBoxFlags(boxFlags);
+      imapFolder->SetExplicitlyVerify(explicitlyVerify);
+      imapFolder->GetOnlineName(onlineName);
+
+      // online name needs to use the correct hierarchy delimiter (I think...)
+      // or the canonical path - one or the other, but be consistent.
+      MsgReplaceChar(dupFolderPath, '/', hierarchyDelimiter);
+      if (hierarchyDelimiter != '/')
+        nsImapUrl::UnescapeSlashes(dupFolderPath.BeginWriting());
+
+      // GMail gives us a localized name for the inbox but doesn't let
+      // us select that localized name.
+      if (boxFlags & kImapInbox)
+        imapFolder->SetOnlineName(NS_LITERAL_CSTRING("INBOX"));
+      else if (onlineName.IsEmpty() || !onlineName.Equals(dupFolderPath))
+        imapFolder->SetOnlineName(dupFolderPath);
+
+      if (hierarchyDelimiter != '/')
+        nsImapUrl::UnescapeSlashes(folderName.BeginWriting());
+      if (NS_SUCCEEDED(CopyMUTF7toUTF16(folderName, unicodeName)))
+        child->SetPrettyName(unicodeName);
+    }
+  }
+  if (!found && child)
+    child->SetMsgDatabase(nullptr); // close the db, so we don't hold open all the .msf files for new folders
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::AddFolderRights(const nsACString& mailboxName, const nsACString& userName,
+                                                    const nsACString& rights)
+{
+  nsCOMPtr <nsIMsgFolder> rootFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootFolder));
+  if(NS_SUCCEEDED(rv) && rootFolder)
+  {
+    nsCOMPtr <nsIMsgImapMailFolder> imapRoot = do_QueryInterface(rootFolder);
+    if (imapRoot)
+    {
+      nsCOMPtr <nsIMsgImapMailFolder> foundFolder;
+      rv = imapRoot->FindOnlineSubFolder(mailboxName, getter_AddRefs(foundFolder));
+      if (NS_SUCCEEDED(rv) && foundFolder)
+        return foundFolder->AddFolderRights(userName, rights);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::FolderNeedsACLInitialized(const nsACString& folderPath,
+                                                              bool *aNeedsACLInitialized)
+{
+  NS_ENSURE_ARG_POINTER(aNeedsACLInitialized);
+  nsCOMPtr <nsIMsgFolder> rootFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootFolder));
+  if(NS_SUCCEEDED(rv) && rootFolder)
+  {
+    nsCOMPtr <nsIMsgImapMailFolder> imapRoot = do_QueryInterface(rootFolder);
+    if (imapRoot)
+    {
+      nsCOMPtr <nsIMsgImapMailFolder> foundFolder;
+      rv = imapRoot->FindOnlineSubFolder(folderPath, getter_AddRefs(foundFolder));
+      if (NS_SUCCEEDED(rv) && foundFolder)
+      {
+        nsCOMPtr <nsIImapMailFolderSink> folderSink = do_QueryInterface(foundFolder);
+        if (folderSink)
+          return folderSink->GetFolderNeedsACLListed(aNeedsACLInitialized);
+      }
+    }
+  }
+  *aNeedsACLInitialized = false; // maybe we want to say TRUE here...
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::RefreshFolderRights(const nsACString& folderPath)
+{
+  nsCOMPtr <nsIMsgFolder> rootFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootFolder));
+  if(NS_SUCCEEDED(rv) && rootFolder)
+  {
+    nsCOMPtr <nsIMsgImapMailFolder> imapRoot = do_QueryInterface(rootFolder);
+    if (imapRoot)
+    {
+      nsCOMPtr <nsIMsgImapMailFolder> foundFolder;
+      rv = imapRoot->FindOnlineSubFolder(folderPath, getter_AddRefs(foundFolder));
+      if (NS_SUCCEEDED(rv) && foundFolder)
+        return foundFolder->RefreshFolderRights();
+    }
+  }
+  return rv;
+}
+
+nsresult nsImapIncomingServer::GetFolder(const nsACString& name, nsIMsgFolder** pFolder)
+{
+  NS_ENSURE_ARG_POINTER(pFolder);
+  NS_ENSURE_TRUE(!name.IsEmpty(), NS_ERROR_FAILURE);
+  nsresult rv;
+  *pFolder = nullptr;
+
+  nsCOMPtr<nsIMsgFolder> rootFolder;
+  rv = GetRootFolder(getter_AddRefs(rootFolder));
+  if (NS_SUCCEEDED(rv) && rootFolder)
+  {
+    nsCString uri;
+    rv = rootFolder->GetURI(uri);
+    if (NS_SUCCEEDED(rv) && !uri.IsEmpty())
+    {
+      nsAutoCString uriString(uri);
+      uriString.Append('/');
+      uriString.Append(name);
+      nsCOMPtr<nsIRDFService> rdf(do_GetService(kRDFServiceCID, &rv));
+      NS_ENSURE_SUCCESS(rv, rv);
+      nsCOMPtr<nsIRDFResource> res;
+      rv = rdf->GetResource(uriString, getter_AddRefs(res));
+      if (NS_SUCCEEDED(rv))
+      {
+        nsCOMPtr<nsIMsgFolder> folder(do_QueryInterface(res, &rv));
+        if (NS_SUCCEEDED(rv) && folder)
+          folder.swap(*pFolder);
+      }
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP  nsImapIncomingServer::OnlineFolderDelete(const nsACString& aFolderName)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP  nsImapIncomingServer::OnlineFolderCreateFailed(const nsACString& aFolderName)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::OnlineFolderRename(nsIMsgWindow *msgWindow, const nsACString& oldName,
+                                                       const nsACString& newName)
+{
+  nsresult rv = NS_ERROR_FAILURE;
+  if (!newName.IsEmpty())
+  {
+    nsCOMPtr<nsIMsgFolder> me;
+    rv = GetFolder(oldName, getter_AddRefs(me));
+    if (NS_FAILED(rv))
+      return rv;
+
+    nsCOMPtr<nsIMsgFolder> parent;
+    nsCString tmpNewName (newName);
+    int32_t folderStart = tmpNewName.RFindChar('/');
+    if (folderStart > 0)
+    {
+      rv = GetFolder(StringHead(tmpNewName, folderStart), getter_AddRefs(parent));
+    }
+    else  // root is the parent
+      rv = GetRootFolder(getter_AddRefs(parent));
+    if (NS_SUCCEEDED(rv) && parent)
+    {
+      nsCOMPtr<nsIMsgImapMailFolder> folder;
+      folder = do_QueryInterface(me, &rv);
+      if (NS_SUCCEEDED(rv))
+      {
+        folder->RenameLocal(tmpNewName, parent);
+        nsCOMPtr<nsIMsgImapMailFolder> parentImapFolder = do_QueryInterface(parent);
+
+        if (parentImapFolder)
+          parentImapFolder->RenameClient(msgWindow, me, oldName, tmpNewName);
+
+        nsCOMPtr <nsIMsgFolder> newFolder;
+        nsString unicodeNewName;
+        // tmpNewName is imap mod utf7. It needs to be convert to utf8.
+        CopyMUTF7toUTF16(tmpNewName, unicodeNewName);
+        CopyUTF16toUTF8(unicodeNewName, tmpNewName);
+        rv = GetFolder(tmpNewName, getter_AddRefs(newFolder));
+        if (NS_SUCCEEDED(rv))
+        {
+          nsCOMPtr <nsIAtom> folderRenameAtom;
+          folderRenameAtom = MsgGetAtom("RenameCompleted");
+          newFolder->NotifyFolderEvent(folderRenameAtom);
+        }
+      }
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP  nsImapIncomingServer::FolderIsNoSelect(const nsACString& aFolderName, bool *result)
+{
+  NS_ENSURE_ARG_POINTER(result);
+  nsCOMPtr<nsIMsgFolder> msgFolder;
+  nsresult rv = GetFolder(aFolderName, getter_AddRefs(msgFolder));
+  if (NS_SUCCEEDED(rv) && msgFolder)
+  {
+    uint32_t flags;
+    msgFolder->GetFlags(&flags);
+    *result = ((flags & nsMsgFolderFlags::ImapNoselect) != 0);
+  }
+  else
+   *result = false;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::SetFolderAdminURL(const nsACString& aFolderName, const nsACString& aFolderAdminUrl)
+{
+  nsCOMPtr <nsIMsgFolder> rootFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootFolder));
+  if(NS_SUCCEEDED(rv) && rootFolder)
+  {
+    nsCOMPtr <nsIMsgImapMailFolder> imapRoot = do_QueryInterface(rootFolder);
+    if (imapRoot)
+    {
+      nsCOMPtr <nsIMsgImapMailFolder> foundFolder;
+      rv = imapRoot->FindOnlineSubFolder(aFolderName, getter_AddRefs(foundFolder));
+      if (NS_SUCCEEDED(rv) && foundFolder)
+        return foundFolder->SetAdminUrl(aFolderAdminUrl);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP  nsImapIncomingServer::FolderVerifiedOnline(const nsACString& folderName, bool *aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = false;
+  nsCOMPtr<nsIMsgFolder> rootFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootFolder));
+  if (NS_SUCCEEDED(rv) && rootFolder)
+  {
+    nsCOMPtr<nsIMsgFolder> folder;
+    rv = rootFolder->FindSubFolder(folderName, getter_AddRefs(folder));
+    if (NS_SUCCEEDED(rv) && folder)
+    {
+      nsCOMPtr<nsIMsgImapMailFolder> imapFolder = do_QueryInterface(folder);
+      if (imapFolder)
+        imapFolder->GetVerifiedAsOnlineFolder(aResult);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::DiscoveryDone()
+{
+  if (mDoingSubscribeDialog)
+    return NS_OK;
+
+  nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootMsgFolder));
+  if (NS_SUCCEEDED(rv) && rootMsgFolder)
+  {
+    // GetResource() may return a node which is not in the folder
+    // tree hierarchy but in the rdf cache in case of the non-existing default
+    // Sent, Drafts, and Templates folders. The resouce will be eventually
+    // released when the rdf service shuts down. When we create the default
+    // folders later on in the imap server, the subsequent GetResource() of the
+    // same uri will get us the cached rdf resource which should have the folder
+    // flag set appropriately.
+    nsCOMPtr<nsIRDFService> rdf(do_GetService("@mozilla.org/rdf/rdf-service;1",
+                                              &rv));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIMsgAccountManager> accountMgr = do_GetService(NS_MSGACCOUNTMANAGER_CONTRACTID, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIMsgIdentity> identity;
+    rv = accountMgr->GetFirstIdentityForServer(this, getter_AddRefs(identity));
+    if (NS_SUCCEEDED(rv) && identity)
+    {
+      nsCString folderUri;
+      identity->GetFccFolder(folderUri);
+      nsCString existingUri;
+
+      if (CheckSpecialFolder(rdf, folderUri, nsMsgFolderFlags::SentMail,
+                             existingUri))
+      {
+        identity->SetFccFolder(existingUri);
+        identity->SetFccFolderPickerMode(NS_LITERAL_CSTRING("1"));
+      }
+      identity->GetDraftFolder(folderUri);
+      if (CheckSpecialFolder(rdf, folderUri, nsMsgFolderFlags::Drafts,
+                             existingUri))
+      {
+        identity->SetDraftFolder(existingUri);
+        identity->SetDraftsFolderPickerMode(NS_LITERAL_CSTRING("1"));
+      }
+      bool archiveEnabled;
+      identity->GetArchiveEnabled(&archiveEnabled);
+      if (archiveEnabled)
+      {
+        identity->GetArchiveFolder(folderUri);
+        if (CheckSpecialFolder(rdf, folderUri, nsMsgFolderFlags::Archive,
+                               existingUri))
+        {
+          identity->SetArchiveFolder(existingUri);
+          identity->SetArchivesFolderPickerMode(NS_LITERAL_CSTRING("1"));
+        }
+      }
+      identity->GetStationeryFolder(folderUri);
+      nsCOMPtr<nsIRDFResource> res;
+      if (!folderUri.IsEmpty() && NS_SUCCEEDED(rdf->GetResource(folderUri, getter_AddRefs(res))))
+      {
+        nsCOMPtr<nsIMsgFolder> folder(do_QueryInterface(res, &rv));
+        if (NS_SUCCEEDED(rv))
+          rv = folder->SetFlag(nsMsgFolderFlags::Templates);
+      }
+    }
+
+    nsCOMPtr<nsISpamSettings> spamSettings;
+    rv = GetSpamSettings(getter_AddRefs(spamSettings));
+    if (NS_SUCCEEDED(rv) && spamSettings)
+    {
+      nsCString spamFolderUri, existingUri;
+      spamSettings->GetSpamFolderURI(getter_Copies(spamFolderUri));
+      if (CheckSpecialFolder(rdf, spamFolderUri, nsMsgFolderFlags::Junk,
+                             existingUri))
+      {
+        // This only sets the cached values in the spam settings object.
+        spamSettings->SetActionTargetFolder(existingUri.get());
+        spamSettings->SetMoveTargetMode(nsISpamSettings::MOVE_TARGET_MODE_FOLDER);
+        // Set the preferences too so that the values persist.
+        SetCharValue("spamActionTargetFolder", existingUri);
+        SetIntValue("moveTargetMode", nsISpamSettings::MOVE_TARGET_MODE_FOLDER);
+      }
+    }
+
+    bool isGMailServer;
+    GetIsGMailServer(&isGMailServer);
+
+    // Verify there is only one trash folder. Another might be present if
+    // the trash name has been changed. Or we might be a gmail server and
+    // want to switch to gmail's trash folder.
+    nsCOMPtr<nsIArray> trashFolders;
+    rv = rootMsgFolder->GetFoldersWithFlags(nsMsgFolderFlags::Trash,
+                                            getter_AddRefs(trashFolders));
+
+    if (NS_SUCCEEDED(rv) && trashFolders)
+    {
+      uint32_t numFolders;
+      trashFolders->GetLength(&numFolders);
+      nsAutoString trashName;
+      if (NS_SUCCEEDED(GetTrashFolderName(trashName)))
+      {
+        for (uint32_t i = 0; i < numFolders; i++)
+        {
+          nsCOMPtr<nsIMsgFolder> trashFolder(do_QueryElementAt(trashFolders, i));
+          if (trashFolder)
+          {
+            // If we're a gmail server, we clear the trash flags from folder(s)
+            // without the kImapXListTrash flag. For normal servers, we clear
+            // the trash folder flag if the folder name doesn't match the
+            // pref trash folder name.
+            if (isGMailServer)
+            {
+              nsCOMPtr<nsIMsgImapMailFolder> imapFolder(do_QueryInterface(trashFolder));
+              int32_t boxFlags;
+              imapFolder->GetBoxFlags(&boxFlags);
+              if (boxFlags & kImapXListTrash)
+              {
+                continue;
+              }
+            }
+            else
+            {
+              // trashName is the leaf name on the folder URI, which will be
+              // different from the folder GetName if the trash name is
+              // localized.
+              nsAutoCString trashURL;
+              trashFolder->GetFolderURL(trashURL);
+              int32_t leafPos = trashURL.RFindChar('/');
+              nsAutoCString unescapedName;
+              MsgUnescapeString(Substring(trashURL, leafPos + 1),
+                                nsINetUtil::ESCAPE_URL_PATH, unescapedName);
+              nsAutoString nameUnicode;
+              if (NS_FAILED(CopyMUTF7toUTF16(unescapedName, nameUnicode)) ||
+                  trashName.Equals(nameUnicode))
+              {
+                continue;
+              }
+              if (numFolders == 1)
+              {
+                // We got here because the preferred trash folder does not
+                // exist, but a folder got discovered to be the trash folder.
+                SetUnicharValue(PREF_TRASH_FOLDER_NAME, nameUnicode);
+                continue;
+              }
+            }
+            trashFolder->ClearFlag(nsMsgFolderFlags::Trash);
+          }
+        }
+      }
+    }
+  }
+
+  bool usingSubscription = true;
+  GetUsingSubscription(&usingSubscription);
+
+  nsCOMArray<nsIMsgImapMailFolder> unverifiedFolders;
+  GetUnverifiedFolders(unverifiedFolders);
+
+  int32_t count = unverifiedFolders.Count();
+  for (int32_t k = 0; k < count; ++k)
+  {
+    bool explicitlyVerify = false;
+    bool hasSubFolders = false;
+    uint32_t folderFlags;
+    nsCOMPtr<nsIMsgImapMailFolder> currentImapFolder(unverifiedFolders[k]);
+    nsCOMPtr<nsIMsgFolder> currentFolder(do_QueryInterface(currentImapFolder, &rv));
+    if (NS_FAILED(rv))
+      continue;
+
+    currentFolder->GetFlags(&folderFlags);
+    if (folderFlags & nsMsgFolderFlags::Virtual) // don't remove virtual folders
+      continue;
+
+    if ((!usingSubscription ||
+         (NS_SUCCEEDED(currentImapFolder->GetExplicitlyVerify(&explicitlyVerify)) &&
+          explicitlyVerify)) ||
+        ((NS_SUCCEEDED(currentFolder->GetHasSubFolders(&hasSubFolders)) &&
+          hasSubFolders) &&
+         !NoDescendentsAreVerified(currentFolder)))
+    {
+      bool isNamespace;
+      currentImapFolder->GetIsNamespace(&isNamespace);
+      if (!isNamespace) // don't list namespaces explicitly
+      {
+        // If there are no subfolders and this is unverified, we don't want to
+        // run this url. That is, we want to undiscover the folder.
+        // If there are subfolders and no descendants are verified, we want to
+        // undiscover all of the folders.
+        // Only if there are subfolders and at least one of them is verified
+        // do we want to refresh that folder's flags, because it won't be going
+        // away.
+        currentImapFolder->SetExplicitlyVerify(false);
+        currentImapFolder->List();
+      }
+    }
+    else
+      DeleteNonVerifiedFolders(currentFolder);
+  }
+
+  return rv;
+}
+
+// Check if the special folder corresponding to the uri exists. If not, check
+// if there already exists a folder with the special folder flag (the server may
+// have told us about a folder to use through XLIST). If so, return the uri of
+// the existing special folder. If not, set the special flag on the folder so
+// it will be there if and when the folder is created.
+// Return true if we found an existing special folder different than
+// the one specified in prefs, and the one specified by prefs doesn't exist.
+bool nsImapIncomingServer::CheckSpecialFolder(nsIRDFService *rdf,
+                                                nsCString &folderUri,
+                                                uint32_t folderFlag,
+                                                nsCString &existingUri)
+{
+  nsCOMPtr<nsIRDFResource> res;
+  nsCOMPtr<nsIMsgFolder> folder;
+  nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootMsgFolder));
+  NS_ENSURE_SUCCESS(rv, false);
+  nsCOMPtr<nsIMsgFolder> existingFolder;
+  rootMsgFolder->GetFolderWithFlags(folderFlag, getter_AddRefs(existingFolder));
+
+  if (!folderUri.IsEmpty() && NS_SUCCEEDED(rdf->GetResource(folderUri, getter_AddRefs(res))))
+  {
+    folder = do_QueryInterface(res, &rv);
+    if (NS_SUCCEEDED(rv))
+    {
+      nsCOMPtr<nsIMsgFolder> parent;
+      folder->GetParent(getter_AddRefs(parent));
+      if (parent)
+      {
+        existingFolder = nullptr;
+      }
+      if (!existingFolder)
+      {
+        folder->SetFlag(folderFlag);
+      }
+
+      nsString folderName;
+      folder->GetPrettyName(folderName);
+      // this will set the localized name based on the folder flag.
+      folder->SetPrettyName(folderName);
+    }
+  }
+
+  if (existingFolder)
+  {
+    existingFolder->GetURI(existingUri);
+    return true;
+  }
+
+  return false;
+}
+
+nsresult nsImapIncomingServer::DeleteNonVerifiedFolders(nsIMsgFolder *curFolder)
+{
+  bool autoUnsubscribeFromNoSelectFolders = true;
+  nsresult rv;
+  nsCOMPtr<nsIPrefBranch> prefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
+  if (NS_SUCCEEDED(rv))
+    prefBranch->GetBoolPref("mail.imap.auto_unsubscribe_from_noselect_folders", &autoUnsubscribeFromNoSelectFolders);
+
+  nsCOMPtr<nsISimpleEnumerator> subFolders;
+
+  rv = curFolder->GetSubFolders(getter_AddRefs(subFolders));
+  if(NS_SUCCEEDED(rv))
+  {
+    bool moreFolders;
+
+    while (NS_SUCCEEDED(subFolders->HasMoreElements(&moreFolders)) && moreFolders)
+    {
+      nsCOMPtr<nsISupports> child;
+      rv = subFolders->GetNext(getter_AddRefs(child));
+      if (NS_SUCCEEDED(rv) && child)
+      {
+        bool childVerified = false;
+        nsCOMPtr <nsIMsgImapMailFolder> childImapFolder = do_QueryInterface(child, &rv);
+        if (NS_SUCCEEDED(rv) && childImapFolder)
+        {
+          uint32_t flags;
+
+          nsCOMPtr <nsIMsgFolder> childFolder = do_QueryInterface(child, &rv);
+          rv = childImapFolder->GetVerifiedAsOnlineFolder(&childVerified);
+
+          rv = childFolder->GetFlags(&flags);
+          bool folderIsNoSelectFolder = NS_SUCCEEDED(rv) && ((flags & nsMsgFolderFlags::ImapNoselect) != 0);
+
+          bool usingSubscription = true;
+          GetUsingSubscription(&usingSubscription);
+          if (usingSubscription)
+          {
+            bool folderIsNameSpace = false;
+            bool noDescendentsAreVerified = NoDescendentsAreVerified(childFolder);
+            bool shouldDieBecauseNoSelect = (folderIsNoSelectFolder ?
+              ((noDescendentsAreVerified || AllDescendentsAreNoSelect(childFolder)) && !folderIsNameSpace)
+              : false);
+            if (!childVerified && (noDescendentsAreVerified || shouldDieBecauseNoSelect))
+            {
+            }
+          }
+          else
+          {
+          }
+        }
+      }
+    }
+  }
+
+  nsCOMPtr<nsIMsgFolder> parent;
+  rv = curFolder->GetParent(getter_AddRefs(parent));
+
+  if (NS_SUCCEEDED(rv) && parent)
+  {
+    nsCOMPtr<nsIMsgImapMailFolder> imapParent = do_QueryInterface(parent);
+    if (imapParent)
+      imapParent->RemoveSubFolder(curFolder);
+  }
+
+  return rv;
+}
+
+bool nsImapIncomingServer::NoDescendentsAreVerified(nsIMsgFolder *parentFolder)
+{
+  bool nobodyIsVerified = true;
+  nsCOMPtr<nsISimpleEnumerator> subFolders;
+  nsresult rv = parentFolder->GetSubFolders(getter_AddRefs(subFolders));
+  if(NS_SUCCEEDED(rv))
+  {
+    bool moreFolders;
+    while (NS_SUCCEEDED(subFolders->HasMoreElements(&moreFolders)) &&
+           moreFolders && nobodyIsVerified)
+    {
+      nsCOMPtr<nsISupports> child;
+      rv = subFolders->GetNext(getter_AddRefs(child));
+      if (NS_SUCCEEDED(rv) && child)
+      {
+        bool childVerified = false;
+        nsCOMPtr <nsIMsgImapMailFolder> childImapFolder = do_QueryInterface(child, &rv);
+        if (NS_SUCCEEDED(rv) && childImapFolder)
+        {
+          nsCOMPtr <nsIMsgFolder> childFolder = do_QueryInterface(child, &rv);
+          rv = childImapFolder->GetVerifiedAsOnlineFolder(&childVerified);
+          nobodyIsVerified = !childVerified && NoDescendentsAreVerified(childFolder);
+        }
+      }
+    }
+  }
+  return nobodyIsVerified;
+}
+
+
+bool nsImapIncomingServer::AllDescendentsAreNoSelect(nsIMsgFolder *parentFolder)
+{
+  bool allDescendentsAreNoSelect = true;
+  nsCOMPtr<nsISimpleEnumerator> subFolders;
+  nsresult rv = parentFolder->GetSubFolders(getter_AddRefs(subFolders));
+  if(NS_SUCCEEDED(rv))
+  {
+    bool moreFolders;
+    while (NS_SUCCEEDED(subFolders->HasMoreElements(&moreFolders)) &&
+           moreFolders && allDescendentsAreNoSelect)
+    {
+      nsCOMPtr<nsISupports> child;
+      rv = subFolders->GetNext(getter_AddRefs(child));
+      if (NS_SUCCEEDED(rv) && child)
+      {
+        bool childIsNoSelect = false;
+        nsCOMPtr <nsIMsgImapMailFolder> childImapFolder = do_QueryInterface(child, &rv);
+        if (NS_SUCCEEDED(rv) && childImapFolder)
+        {
+          uint32_t flags;
+          nsCOMPtr <nsIMsgFolder> childFolder = do_QueryInterface(child, &rv);
+          rv = childFolder->GetFlags(&flags);
+          childIsNoSelect = NS_SUCCEEDED(rv) && (flags & nsMsgFolderFlags::ImapNoselect);
+          allDescendentsAreNoSelect = !childIsNoSelect && AllDescendentsAreNoSelect(childFolder);
+        }
+      }
+    }
+  }
+#if 0
+  int numberOfSubfolders = parentFolder->GetNumSubFolders();
+
+  for (int childIndex=0; allDescendantsAreNoSelect && (childIndex < numberOfSubfolders); childIndex++)
+  {
+    MSG_IMAPFolderInfoMail *currentChild = (MSG_IMAPFolderInfoMail *) parentFolder->GetSubFolder(childIndex);
+    allDescendentsAreNoSelect = (currentChild->GetFolderPrefFlags() & MSG_FOLDER_PREF_IMAPNOSELECT) &&
+      AllDescendentsAreNoSelect(currentChild);
+  }
+#endif // 0
+  return allDescendentsAreNoSelect;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::PromptLoginFailed(nsIMsgWindow *aMsgWindow,
+                                        int32_t *aResult)
+{
+  nsAutoCString hostName;
+  GetRealHostName(hostName);
+
+  return MsgPromptLoginFailed(aMsgWindow, hostName, aResult);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::FEAlert(const nsAString& aAlertString,
+                              nsIMsgMailNewsUrl *aUrl)
+{
+  GetStringBundle();
+
+  if (m_stringBundle)
+  {
+    nsAutoString hostName;
+    nsresult rv = GetPrettyName(hostName);
+    if (NS_SUCCEEDED(rv))
+    {
+      nsString message;
+      nsString tempString(aAlertString);
+      const char16_t *params[] = { hostName.get(), tempString.get() };
+
+      rv = m_stringBundle->FormatStringFromName(
+        u"imapServerAlert",
+        params, 2, getter_Copies(message));
+      if (NS_SUCCEEDED(rv))
+        return AlertUser(message, aUrl);
+    }
+  }
+  return AlertUser(aAlertString, aUrl);
+}
+
+nsresult nsImapIncomingServer::AlertUser(const nsAString& aString,
+                                         nsIMsgMailNewsUrl *aUrl)
+{
+  nsresult rv;
+  nsCOMPtr <nsIMsgMailSession> mailSession =
+    do_GetService(NS_MSGMAILSESSION_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return mailSession->AlertUser(aString, aUrl);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::FEAlertWithName(const char* aMsgName, nsIMsgMailNewsUrl *aUrl)
+{
+  // don't bother the user if we're shutting down.
+  if (m_shuttingDown)
+    return NS_OK;
+
+  GetStringBundle();
+
+  nsString message;
+
+  if (m_stringBundle)
+  {
+    nsAutoCString hostName;
+    nsresult rv = GetHostName(hostName);
+    if (NS_SUCCEEDED(rv))
+    {
+      const NS_ConvertUTF8toUTF16 hostName16(hostName);
+      const char16_t *params[] = { hostName16.get() };
+      rv = m_stringBundle->FormatStringFromName(
+        NS_ConvertASCIItoUTF16(aMsgName).get(),
+        params, 1,getter_Copies(message));
+      if (NS_SUCCEEDED(rv))
+        return AlertUser(message, aUrl);
+    }
+  }
+
+  // Error condition
+  message.AssignLiteral("String Name ");
+  message.AppendASCII(aMsgName);
+  FEAlert(message, aUrl);
+  return NS_OK;
+}
+
+NS_IMETHODIMP  nsImapIncomingServer::FEAlertFromServer(const nsACString& aServerString,
+                                                       nsIMsgMailNewsUrl *aUrl)
+{
+  NS_ENSURE_TRUE(!aServerString.IsEmpty(), NS_OK);
+
+  nsCString message(aServerString);
+  message.Trim(" \t\b\r\n");
+  if (message.Last() != '.')
+    message.Append('.');
+
+  // Skip over the first two words (the command tag and "NO").
+  // Find the first word break.
+  int32_t pos = message.FindChar(' ');
+
+  // Find the second word break.
+  if (pos != -1)
+    pos = message.FindChar(' ', pos + 1);
+
+  // Adjust the message.
+  if (pos != -1)
+    message = Substring(message, pos + 1);
+
+  nsString hostName;
+  GetPrettyName(hostName);
+
+  const char16_t *formatStrings[] =
+  {
+    hostName.get(),
+    nullptr,
+    nullptr
+  };
+
+  nsString msgName;
+  int32_t numStrings;
+  nsString fullMessage;
+  nsCOMPtr<nsIImapUrl> imapUrl = do_QueryInterface(aUrl);
+  NS_ENSURE_TRUE(imapUrl, NS_ERROR_INVALID_ARG);
+
+  nsImapState imapState;
+  nsImapAction imapAction;
+
+  imapUrl->GetRequiredImapState(&imapState);
+  imapUrl->GetImapAction(&imapAction);
+  nsString folderName;
+
+  NS_ConvertUTF8toUTF16 unicodeMsg(message);
+
+  nsCOMPtr<nsIMsgFolder> folder;
+  if (imapState == nsIImapUrl::nsImapSelectedState ||
+      imapAction == nsIImapUrl::nsImapFolderStatus)
+  {
+    aUrl->GetFolder(getter_AddRefs(folder));
+    if (folder)
+      folder->GetPrettyName(folderName);
+    numStrings = 3;
+    msgName.AssignLiteral("imapFolderCommandFailed");
+    formatStrings[1] = folderName.get();
+  }
+  else
+  {
+    msgName.AssignLiteral("imapServerCommandFailed");
+    numStrings = 2;
+  }
+
+  formatStrings[numStrings -1] = unicodeMsg.get();
+
+  nsresult rv = GetStringBundle();
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (m_stringBundle)
+  {
+    rv = m_stringBundle->FormatStringFromName(msgName.get(),
+      formatStrings, numStrings, getter_Copies(fullMessage));
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  return AlertUser(fullMessage, aUrl);
+}
+
+#define IMAP_MSGS_URL       "chrome://messenger/locale/imapMsgs.properties"
+
+nsresult nsImapIncomingServer::GetStringBundle()
+{
+  if (m_stringBundle)
+    return NS_OK;
+
+  nsCOMPtr<nsIStringBundleService> sBundleService =
+    mozilla::services::GetStringBundleService();
+  NS_ENSURE_TRUE(sBundleService, NS_ERROR_UNEXPECTED);
+  return sBundleService->CreateBundle(IMAP_MSGS_URL, getter_AddRefs(m_stringBundle));
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetImapStringByName(const char* msgName, nsAString& aString)
+{
+  nsresult rv = NS_OK;
+  GetStringBundle();
+  if (m_stringBundle)
+  {
+    nsString res_str;
+    rv = m_stringBundle->GetStringFromName(
+       NS_ConvertASCIItoUTF16(msgName).get(),
+       getter_Copies(res_str));
+    aString.Assign(res_str);
+    if (NS_SUCCEEDED(rv))
+      return rv;
+  }
+  aString.AssignLiteral("String Name ");
+  // mscott: FIX ME
+  aString.AppendASCII(msgName);
+  return NS_OK;
+}
+
+nsresult nsImapIncomingServer::ResetFoldersToUnverified(nsIMsgFolder *parentFolder)
+{
+  nsresult rv = NS_OK;
+  if (!parentFolder)
+  {
+    nsCOMPtr<nsIMsgFolder> rootFolder;
+    rv = GetRootFolder(getter_AddRefs(rootFolder));
+    NS_ENSURE_SUCCESS(rv, rv);
+    return ResetFoldersToUnverified(rootFolder);
+  }
+  else
+  {
+    nsCOMPtr<nsISimpleEnumerator> subFolders;
+    nsCOMPtr<nsIMsgImapMailFolder> imapFolder = do_QueryInterface(parentFolder, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+    rv = imapFolder->SetVerifiedAsOnlineFolder(false);
+    rv = parentFolder->GetSubFolders(getter_AddRefs(subFolders));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    bool moreFolders = false;
+    while (NS_SUCCEEDED(subFolders->HasMoreElements(&moreFolders)) && moreFolders)
+    {
+      nsCOMPtr<nsISupports> child;
+      rv = subFolders->GetNext(getter_AddRefs(child));
+      if (NS_SUCCEEDED(rv) && child)
+      {
+        nsCOMPtr<nsIMsgFolder> childFolder = do_QueryInterface(child, &rv);
+        if (NS_SUCCEEDED(rv) && childFolder)
+        {
+          rv = ResetFoldersToUnverified(childFolder);
+          if (NS_FAILED(rv))
+            break;
+        }
+      }
+    }
+  }
+  return rv;
+}
+
+void
+nsImapIncomingServer::GetUnverifiedFolders(nsCOMArray<nsIMsgImapMailFolder> &aFoldersArray)
+{
+  nsCOMPtr<nsIMsgFolder> rootFolder;
+  if (NS_FAILED(GetRootFolder(getter_AddRefs(rootFolder))) || !rootFolder)
+    return;
+
+  nsCOMPtr<nsIMsgImapMailFolder> imapRoot(do_QueryInterface(rootFolder));
+  // don't need to verify the root.
+  if (imapRoot)
+    imapRoot->SetVerifiedAsOnlineFolder(true);
+
+  GetUnverifiedSubFolders(rootFolder, aFoldersArray);
+}
+
+void
+nsImapIncomingServer::GetUnverifiedSubFolders(nsIMsgFolder *parentFolder,
+                                              nsCOMArray<nsIMsgImapMailFolder> &aFoldersArray)
+{
+  nsCOMPtr<nsIMsgImapMailFolder> imapFolder(do_QueryInterface(parentFolder));
+
+  bool verified = false, explicitlyVerify = false;
+  if (imapFolder)
+  {
+    nsresult rv = imapFolder->GetVerifiedAsOnlineFolder(&verified);
+    if (NS_SUCCEEDED(rv))
+      rv = imapFolder->GetExplicitlyVerify(&explicitlyVerify);
+
+    if (NS_SUCCEEDED(rv) && (!verified || explicitlyVerify))
+      aFoldersArray.AppendObject(imapFolder);
+  }
+
+  nsCOMPtr<nsISimpleEnumerator> subFolders;
+  if (NS_SUCCEEDED(parentFolder->GetSubFolders(getter_AddRefs(subFolders))))
+  {
+    bool moreFolders;
+
+    while (NS_SUCCEEDED(subFolders->HasMoreElements(&moreFolders)) && moreFolders)
+    {
+      nsCOMPtr<nsISupports> child;
+      subFolders->GetNext(getter_AddRefs(child));
+      if (child)
+      {
+        nsCOMPtr<nsIMsgFolder> childFolder(do_QueryInterface(child));
+        if (childFolder)
+          GetUnverifiedSubFolders(childFolder, aFoldersArray);
+      }
+    }
+  }
+}
+
+NS_IMETHODIMP nsImapIncomingServer::ForgetSessionPassword()
+{
+  nsresult rv = nsMsgIncomingServer::ForgetSessionPassword();
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // fix for bugscape bug #15485
+  // if we use turbo, and we logout, we need to make sure
+  // the server doesn't think it's authenticated.
+  // the biff timer continues to fire when you use turbo
+  // (see #143848).  if we exited, we've set the password to null
+  // but if we're authenticated, and the biff timer goes off
+  // we'll still perform biff, because we use m_userAuthenticated
+  // to determine if we require a password for biff.
+  // (if authenticated, we don't require a password
+  // see nsMsgBiffManager::PerformBiff())
+  // performing biff without a password will pop up the prompt dialog
+  // which is pretty wacky, when it happens after you quit the application
+  m_userAuthenticated = false;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::GetServerRequiresPasswordForBiff(bool *aServerRequiresPasswordForBiff)
+{
+  NS_ENSURE_ARG_POINTER(aServerRequiresPasswordForBiff);
+  // if the user has already been authenticated, we've got the password
+  *aServerRequiresPasswordForBiff = !m_userAuthenticated;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::ForgetPassword()
+{
+  return nsMsgIncomingServer::ForgetPassword();
+}
+
+
+NS_IMETHODIMP
+nsImapIncomingServer::AsyncGetPassword(nsIImapProtocol *aProtocol,
+                                       bool aNewPasswordRequested,
+                                       nsACString &aPassword)
+{
+  if (m_password.IsEmpty())
+  {
+    // We're now going to need to do something that will end up with us either
+    // poking login manager or prompting the user. We need to ensure we only
+    // do one prompt at a time (and login manager could cause a master password
+    // prompt), so we need to use the async prompter.
+    nsresult rv;
+    nsCOMPtr<nsIMsgAsyncPrompter> asyncPrompter =
+      do_GetService(NS_MSGASYNCPROMPTER_CONTRACTID, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+    nsCOMPtr<nsIMsgAsyncPromptListener> promptListener(do_QueryInterface(aProtocol));
+    rv = asyncPrompter->QueueAsyncAuthPrompt(m_serverKey, aNewPasswordRequested,
+                                             promptListener);
+    // Explict NS_ENSURE_SUCCESS for debug purposes as errors tend to get
+    // hidden.
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+  if (!m_password.IsEmpty())
+    aPassword = m_password;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::PromptPassword(nsIMsgWindow *aMsgWindow,
+                                     nsACString &aPassword)
+{
+  nsString passwordTitle;
+  GetImapStringByName("imapEnterPasswordPromptTitle", passwordTitle);
+  NS_ENSURE_STATE(m_stringBundle);
+
+  nsAutoCString userName;
+  GetRealUsername(userName);
+
+  nsAutoCString hostName;
+  GetRealHostName(hostName);
+
+  nsresult rv = GetStringBundle();
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  NS_ConvertASCIItoUTF16 finalUserName(userName);
+  NS_ConvertASCIItoUTF16 finalHostName(hostName);
+
+  const char16_t *formatStrings[] = { finalUserName.get(), finalHostName.get() };
+
+  nsString passwordText;
+  rv = m_stringBundle->FormatStringFromName(
+    u"imapEnterServerPasswordPrompt",
+    formatStrings, 2, getter_Copies(passwordText));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = GetPasswordWithUI(passwordText, passwordTitle, aMsgWindow, aPassword);
+  if (NS_SUCCEEDED(rv))
+    m_password = aPassword;
+  return rv;
+}
+
+// for the nsIImapServerSink interface
+NS_IMETHODIMP nsImapIncomingServer::SetCapability(eIMAPCapabilityFlags capability)
+{
+  m_capability = capability;
+  SetIsGMailServer((capability & kGmailImapCapability) != 0);
+  SetCapabilityACL(capability & kACLCapability);
+  SetCapabilityQuota(capability & kQuotaCapability);
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::SetServerID(const nsACString &aServerID)
+{
+  return SetServerIDPref(aServerID);
+}
+
+NS_IMETHODIMP  nsImapIncomingServer::CommitNamespaces()
+{
+  nsresult rv;
+  nsCOMPtr<nsIImapHostSessionList> hostSession = do_GetService(kCImapHostSessionListCID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  return hostSession->CommitNamespacesForHost(this);
+}
+
+NS_IMETHODIMP nsImapIncomingServer::PseudoInterruptMsgLoad(nsIMsgFolder *aImapFolder, nsIMsgWindow *aMsgWindow,
+                                                          bool *interrupted)
+{
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIImapProtocol> connection;
+  PR_CEnterMonitor(this);
+  // iterate through the connection cache for a connection that is loading
+  // a message in this folder and should be pseudo-interrupted.
+  int32_t cnt = m_connectionCache.Count();
+
+  for (int32_t i = 0; i < cnt; ++i)
+  {
+    connection = m_connectionCache[i];
+    if (connection)
+      rv = connection->PseudoInterruptMsgLoad(aImapFolder, aMsgWindow, interrupted);
+  }
+
+  PR_CExitMonitor(this);
+  return rv;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::ResetNamespaceReferences()
+{
+  nsCOMPtr <nsIMsgFolder> rootFolder;
+  nsresult rv = GetRootFolder(getter_AddRefs(rootFolder));
+  if (NS_SUCCEEDED(rv) && rootFolder)
+  {
+    nsCOMPtr <nsIMsgImapMailFolder> imapFolder = do_QueryInterface(rootFolder);
+    if (imapFolder)
+      rv = imapFolder->ResetNamespaceReferences();
+  }
+  return rv;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::SetUserAuthenticated(bool aUserAuthenticated)
+{
+  m_userAuthenticated = aUserAuthenticated;
+  if (aUserAuthenticated)
+  {
+    nsresult rv;
+    nsCOMPtr<nsIMsgAccountManager> accountManager =
+      do_GetService(NS_MSGACCOUNTMANAGER_CONTRACTID, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    accountManager->SetUserNeedsToAuthenticate(false);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::GetUserAuthenticated(bool *aUserAuthenticated)
+{
+  NS_ENSURE_ARG_POINTER(aUserAuthenticated);
+  *aUserAuthenticated = m_userAuthenticated;
+  return NS_OK;
+}
+
+/* void SetMailServerUrls (in string manageMailAccount, in string manageLists, in string manageFilters); */
+NS_IMETHODIMP  nsImapIncomingServer::SetMailServerUrls(const nsACString& manageMailAccount, const nsACString& manageLists,
+                                                       const nsACString& manageFilters)
+{
+  return SetManageMailAccountUrl(manageMailAccount);
+}
+
+NS_IMETHODIMP nsImapIncomingServer::SetManageMailAccountUrl(const nsACString& manageMailAccountUrl)
+{
+  m_manageMailAccountUrl = manageMailAccountUrl;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::GetManageMailAccountUrl(nsACString& manageMailAccountUrl)
+{
+  manageMailAccountUrl = m_manageMailAccountUrl;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::StartPopulatingWithUri(nsIMsgWindow *aMsgWindow, bool aForceToServer /*ignored*/, const char *uri)
+{
+  NS_ENSURE_ARG_POINTER (uri);
+
+  nsresult rv;
+  mDoingSubscribeDialog = true;
+
+  rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  rv = mInner->StartPopulatingWithUri(aMsgWindow, aForceToServer, uri);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // imap always uses the canonical delimiter form of paths for subscribe ui.
+  rv = SetDelimiter('/');
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  rv = SetShowFullName(false);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCString serverUri;
+  rv = GetServerURI(serverUri);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCOMPtr<nsIImapService> imapService = do_GetService(NS_IMAPSERVICE_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+/*
+    if uri = imap://user@host/foo/bar, the serverUri is imap://user@host
+    to get path from uri, skip over imap://user@host + 1 (for the /)
+*/
+  const char *path = uri + serverUri.Length() + 1;
+  return imapService->GetListOfFoldersWithPath(this, aMsgWindow, nsDependentCString(path));
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::StartPopulating(nsIMsgWindow *aMsgWindow, bool aForceToServer /*ignored*/, bool aGetOnlyNew)
+{
+  nsresult rv;
+  mDoingSubscribeDialog = true;
+
+  rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  rv = mInner->StartPopulating(aMsgWindow, aForceToServer, aGetOnlyNew);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // imap always uses the canonical delimiter form of paths for subscribe ui.
+  rv = SetDelimiter('/');
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  rv = SetShowFullName(false);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCOMPtr<nsIImapService> imapService = do_GetService(NS_IMAPSERVICE_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv,rv);
+  return imapService->GetListOfFoldersOnServer(this, aMsgWindow);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::OnStartRunningUrl(nsIURI *url)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::OnStopRunningUrl(nsIURI *url, nsresult exitCode)
+{
+  nsresult rv = exitCode;
+
+  // xxx todo get msgWindow from url
+  nsCOMPtr<nsIMsgWindow> msgWindow;
+  nsCOMPtr<nsIImapUrl> imapUrl = do_QueryInterface(url);
+  if (imapUrl) {
+    nsImapAction imapAction = nsIImapUrl::nsImapTest;
+    imapUrl->GetImapAction(&imapAction);
+    switch (imapAction) {
+    case nsIImapUrl::nsImapDiscoverAllAndSubscribedBoxesUrl:
+    case nsIImapUrl::nsImapDiscoverChildrenUrl:
+      rv = UpdateSubscribed();
+      NS_ENSURE_SUCCESS(rv, rv);
+      mDoingSubscribeDialog = false;
+      rv = StopPopulating(msgWindow);
+      NS_ENSURE_SUCCESS(rv, rv);
+      break;
+    case nsIImapUrl::nsImapDiscoverAllBoxesUrl:
+      if (NS_SUCCEEDED(exitCode))
+        DiscoveryDone();
+      break;
+    case nsIImapUrl::nsImapFolderStatus:
+    {
+      nsCOMPtr<nsIMsgFolder> msgFolder;
+      nsCOMPtr<nsIMsgMailNewsUrl> mailUrl = do_QueryInterface(imapUrl);
+      mailUrl->GetFolder(getter_AddRefs(msgFolder));
+      if (msgFolder)
+      {
+        nsresult rv;
+        nsCOMPtr<nsIMsgMailSession> session =
+                 do_GetService(NS_MSGMAILSESSION_CONTRACTID, &rv);
+        NS_ENSURE_SUCCESS(rv, rv);
+        bool folderOpen;
+        rv = session->IsFolderOpenInWindow(msgFolder, &folderOpen);
+        if (NS_SUCCEEDED(rv) && !folderOpen && msgFolder)
+          msgFolder->SetMsgDatabase(nullptr);
+        nsCOMPtr<nsIMsgImapMailFolder> imapFolder = do_QueryInterface(msgFolder);
+        m_foldersToStat.RemoveObject(imapFolder);
+      }
+      // if we get an error running the url, it's better
+      // not to chain the next url.
+      if (NS_FAILED(exitCode) && exitCode != NS_MSG_ERROR_IMAP_COMMAND_FAILED)
+        m_foldersToStat.Clear();
+      if (m_foldersToStat.Count() > 0)
+        m_foldersToStat[0]->UpdateStatus(this, nullptr);
+      break;
+    }
+    default:
+        break;
+    }
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetIncomingServer(nsIMsgIncomingServer *aServer)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->SetIncomingServer(aServer);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetShowFullName(bool showFullName)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->SetShowFullName(showFullName);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetDelimiter(char *aDelimiter)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->GetDelimiter(aDelimiter);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetDelimiter(char aDelimiter)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->SetDelimiter(aDelimiter);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetAsSubscribed(const nsACString &path)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->SetAsSubscribed(path);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::UpdateSubscribed()
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::AddTo(const nsACString &aName, bool addAsSubscribed,
+                            bool aSubscribable, bool changeIfExists)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // RFC 3501 allows UTF-8 in addition to modified UTF-7
+  // If it's not UTF-8, it cannot be MUTF7, either. We just ignore it.
+  // (otherwise we'll crash. see #63186)
+  if (!MsgIsUTF8(aName))
+    return NS_OK;
+
+  if (!NS_IsAscii(aName.BeginReading(), aName.Length())) {
+    nsAutoCString name;
+    CopyUTF16toMUTF7(NS_ConvertUTF8toUTF16(aName), name);
+    return mInner->AddTo(name, addAsSubscribed, aSubscribable, changeIfExists);
+  }
+  return mInner->AddTo(aName, addAsSubscribed, aSubscribable, changeIfExists);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::StopPopulating(nsIMsgWindow *aMsgWindow)
+{
+  nsCOMPtr<nsISubscribeListener> listener;
+  (void) GetSubscribeListener(getter_AddRefs(listener));
+
+  if (listener)
+    listener->OnDonePopulating();
+
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->StopPopulating(aMsgWindow);
+}
+
+
+NS_IMETHODIMP
+nsImapIncomingServer::SubscribeCleanup()
+{
+  m_subscribeFolders.Clear();
+  return ClearInner();
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetSubscribeListener(nsISubscribeListener *aListener)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->SetSubscribeListener(aListener);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetSubscribeListener(nsISubscribeListener **aListener)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->GetSubscribeListener(aListener);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::Subscribe(const char16_t *aName)
+{
+  NS_ENSURE_ARG_POINTER(aName);
+  
+  return SubscribeToFolder(nsDependentString(aName), true, nullptr);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::Unsubscribe(const char16_t *aName)
+{
+  NS_ENSURE_ARG_POINTER(aName);
+
+  return SubscribeToFolder(nsDependentString(aName), false, nullptr);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SubscribeToFolder(const nsAString& aName, bool subscribe, nsIURI **aUri)
+{
+  nsresult rv;
+  nsCOMPtr<nsIImapService> imapService = do_GetService(NS_IMAPSERVICE_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+  rv = GetRootFolder(getter_AddRefs(rootMsgFolder));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Locate the folder so that the correct hierarchical delimiter is used in the
+  // folder pathnames, otherwise root's (ie, '^') is used and this is wrong.
+
+  // aName is not a genuine UTF-16 but just a zero-padded modified UTF-7
+  NS_LossyConvertUTF16toASCII folderCName(aName);
+  nsCOMPtr<nsIMsgFolder> msgFolder;
+  if (rootMsgFolder && !aName.IsEmpty())
+    rv = rootMsgFolder->FindSubFolder(folderCName, getter_AddRefs(msgFolder));
+
+  nsCOMPtr<nsIThread> thread(do_GetCurrentThread());
+
+  nsAutoString unicodeName;
+  rv = CopyMUTF7toUTF16(folderCName, unicodeName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (subscribe)
+    rv = imapService->SubscribeFolder(msgFolder, unicodeName, nullptr, aUri);
+  else
+    rv = imapService->UnsubscribeFolder(msgFolder, unicodeName, nullptr, nullptr);
+  return rv;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetDoingLsub(bool doingLsub)
+{
+  mDoingLsub = doingLsub;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetDoingLsub(bool *doingLsub)
+{
+  NS_ENSURE_ARG_POINTER(doingLsub);
+  *doingLsub = mDoingLsub;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::ReDiscoverAllFolders()
+{
+  return PerformExpand(nullptr);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetState(const nsACString &path, bool state,
+                               bool *stateChanged)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->SetState(path, state, stateChanged);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::HasChildren(const nsACString &path, bool *aHasChildren)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->HasChildren(path, aHasChildren);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::IsSubscribed(const nsACString &path,
+                                   bool *aIsSubscribed)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->IsSubscribed(path, aIsSubscribed);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::IsSubscribable(const nsACString &path, bool *aIsSubscribable)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->IsSubscribable(path, aIsSubscribable);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetLeafName(const nsACString &path, nsAString &aLeafName)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->GetLeafName(path, aLeafName);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetFirstChildURI(const nsACString &path, nsACString &aResult)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->GetFirstChildURI(path, aResult);
+}
+
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetChildren(const nsACString &aPath,
+                                  nsISimpleEnumerator **aResult)
+{
+  nsresult rv = EnsureInner();
+  NS_ENSURE_SUCCESS(rv,rv);
+  return mInner->GetChildren(aPath, aResult);
+}
+
+nsresult
+nsImapIncomingServer::EnsureInner()
+{
+  nsresult rv = NS_OK;
+
+  if (mInner)
+    return NS_OK;
+
+  mInner = do_CreateInstance(kSubscribableServerCID,&rv);
+  NS_ENSURE_SUCCESS(rv,rv);
+  return SetIncomingServer(this);
+}
+
+nsresult
+nsImapIncomingServer::ClearInner()
+{
+  nsresult rv = NS_OK;
+  if (mInner)
+  {
+    rv = mInner->SetSubscribeListener(nullptr);
+    NS_ENSURE_SUCCESS(rv,rv);
+    rv = mInner->SetIncomingServer(nullptr);
+    NS_ENSURE_SUCCESS(rv,rv);
+    mInner = nullptr;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::CommitSubscribeChanges()
+{
+  return ReDiscoverAllFolders();
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetCanBeDefaultServer(bool *canBeDefaultServer)
+{
+  NS_ENSURE_ARG_POINTER(canBeDefaultServer);
+  *canBeDefaultServer = true;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetCanCompactFoldersOnServer(bool *canCompactFoldersOnServer)
+{
+  NS_ENSURE_ARG_POINTER(canCompactFoldersOnServer);
+  // Initialize canCompactFoldersOnServer true, a default value for IMAP
+  *canCompactFoldersOnServer = true;
+  GetPrefForServerAttribute("canCompactFoldersOnServer", canCompactFoldersOnServer);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetCanUndoDeleteOnServer(bool *canUndoDeleteOnServer)
+{
+  NS_ENSURE_ARG_POINTER(canUndoDeleteOnServer);
+  // Initialize canUndoDeleteOnServer true, a default value for IMAP
+  *canUndoDeleteOnServer = true;
+  GetPrefForServerAttribute("canUndoDeleteOnServer", canUndoDeleteOnServer);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetCanSearchMessages(bool *canSearchMessages)
+{
+  NS_ENSURE_ARG_POINTER(canSearchMessages);
+  // Initialize canSearchMessages true, a default value for IMAP
+  *canSearchMessages = true;
+  GetPrefForServerAttribute("canSearchMessages", canSearchMessages);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetCanEmptyTrashOnExit(bool *canEmptyTrashOnExit)
+{
+  NS_ENSURE_ARG_POINTER(canEmptyTrashOnExit);
+  // Initialize canEmptyTrashOnExit true, a default value for IMAP
+  *canEmptyTrashOnExit = true;
+  GetPrefForServerAttribute("canEmptyTrashOnExit", canEmptyTrashOnExit);
+  return NS_OK;
+}
+
+nsresult
+nsImapIncomingServer::CreateHostSpecificPrefName(const char *prefPrefix, nsAutoCString &prefName)
+{
+  NS_ENSURE_ARG_POINTER(prefPrefix);
+
+  nsCString hostName;
+  nsresult rv = GetHostName(hostName);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  prefName = prefPrefix;
+  prefName.Append('.');
+  prefName.Append(hostName);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetSupportsDiskSpace(bool *aSupportsDiskSpace)
+{
+  NS_ENSURE_ARG_POINTER(aSupportsDiskSpace);
+  nsAutoCString prefName;
+  nsresult rv = CreateHostSpecificPrefName("default_supports_diskspace", prefName);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCOMPtr<nsIPrefBranch> prefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
+  if (NS_SUCCEEDED(rv))
+     rv = prefBranch->GetBoolPref(prefName.get(), aSupportsDiskSpace);
+
+  // Couldn't get the default value with the hostname.
+  // Fall back on IMAP default value
+  if (NS_FAILED(rv)) // set default value
+     *aSupportsDiskSpace = true;
+  return NS_OK;
+}
+
+// count number of non-busy connections in cache
+NS_IMETHODIMP
+nsImapIncomingServer::GetNumIdleConnections(int32_t *aNumIdleConnections)
+{
+  NS_ENSURE_ARG_POINTER(aNumIdleConnections);
+  *aNumIdleConnections = 0;
+
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIImapProtocol> connection;
+  bool isBusy = false;
+  bool isInboxConnection;
+  PR_CEnterMonitor(this);
+
+  int32_t cnt = m_connectionCache.Count();
+
+  // loop counting idle connections
+  for (int32_t i = 0; i < cnt; ++i)
+  {
+    connection = m_connectionCache[i];
+    if (connection)
+    {
+      rv = connection->IsBusy(&isBusy, &isInboxConnection);
+      if (NS_FAILED(rv))
+        continue;
+      if (!isBusy)
+        (*aNumIdleConnections)++;
+    }
+  }
+  PR_CExitMonitor(this);
+  return rv;
+}
+
+
+/**
+ * Get the preference that tells us whether the imap server in question allows
+ * us to create subfolders. Some ISPs might not want users to create any folders
+ * besides the existing ones.
+ * We do want to identify all those servers that don't allow creation of subfolders
+ * and take them out of the account picker in the Copies and Folder panel.
+ */
+NS_IMETHODIMP
+nsImapIncomingServer::GetCanCreateFoldersOnServer(bool *aCanCreateFoldersOnServer)
+{
+  NS_ENSURE_ARG_POINTER(aCanCreateFoldersOnServer);
+  // Initialize aCanCreateFoldersOnServer true, a default value for IMAP
+  *aCanCreateFoldersOnServer = true;
+  GetPrefForServerAttribute("canCreateFolders", aCanCreateFoldersOnServer);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetOfflineSupportLevel(int32_t *aSupportLevel)
+{
+  NS_ENSURE_ARG_POINTER(aSupportLevel);
+  nsresult rv = NS_OK;
+
+  rv = GetIntValue("offline_support_level", aSupportLevel);
+  if (*aSupportLevel != OFFLINE_SUPPORT_LEVEL_UNDEFINED)
+    return rv;
+
+  nsAutoCString prefName;
+  rv = CreateHostSpecificPrefName("default_offline_support_level", prefName);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  nsCOMPtr<nsIPrefBranch> prefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
+  if (NS_SUCCEEDED(rv))
+    rv = prefBranch->GetIntPref(prefName.get(), aSupportLevel);
+
+  // Couldn't get the pref value with the hostname.
+  // Fall back on IMAP default value
+  if (NS_FAILED(rv)) // set default value
+    *aSupportLevel = OFFLINE_SUPPORT_LEVEL_REGULAR;
+  return NS_OK;
+}
+
+// Called only during the migration process. This routine enables the generation of
+// unique account name based on the username, hostname and the port. If the port
+// is valid and not a default one, it will be appended to the account name.
+NS_IMETHODIMP
+nsImapIncomingServer::GeneratePrettyNameForMigration(nsAString& aPrettyName)
+{
+  nsCString userName;
+  nsCString hostName;
+
+/**
+  * Pretty name for migrated account is of format username@hostname:<port>,
+  * provided the port is valid and not the default
+*/
+  // Get user name to construct pretty name
+  nsresult rv = GetUsername(userName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Get host name to construct pretty name
+  rv = GetHostName(hostName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  int32_t defaultServerPort;
+  int32_t defaultSecureServerPort;
+
+  // Here, the final contract ID is already known, so use it directly for efficiency.
+  nsCOMPtr <nsIMsgProtocolInfo> protocolInfo = do_GetService(NS_IMAPPROTOCOLINFO_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // Get the default port
+  rv = protocolInfo->GetDefaultServerPort(false, &defaultServerPort);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // Get the default secure port
+  rv = protocolInfo->GetDefaultServerPort(true, &defaultSecureServerPort);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // Get the current server port
+  int32_t serverPort = PORT_NOT_SET;
+  rv = GetPort(&serverPort);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // Is the server secure ?
+  int32_t socketType;
+  rv = GetSocketType(&socketType);
+  NS_ENSURE_SUCCESS(rv,rv);
+  bool isSecure = (socketType == nsMsgSocketType::SSL);
+
+  // Is server port a default port ?
+  bool isItDefaultPort = false;
+  if (((serverPort == defaultServerPort) && !isSecure)||
+      ((serverPort == defaultSecureServerPort) && isSecure))
+      isItDefaultPort = true;
+
+  // Construct pretty name from username and hostname
+  nsAutoString constructedPrettyName;
+  CopyASCIItoUTF16(userName,constructedPrettyName);
+  constructedPrettyName.Append('@');
+  constructedPrettyName.Append(NS_ConvertASCIItoUTF16(hostName));
+
+  // If the port is valid and not default, add port value to the pretty name
+  if ((serverPort > 0) && (!isItDefaultPort)) {
+    constructedPrettyName.Append(':');
+    constructedPrettyName.AppendInt(serverPort);
+  }
+
+  // Format the pretty name
+  return GetFormattedStringFromName(constructedPrettyName,
+                                    "imapDefaultAccountName",
+                                    aPrettyName);
+}
+
+nsresult
+nsImapIncomingServer::GetFormattedStringFromName(const nsAString& aValue,
+                                                 const char* aName,
+                                                 nsAString& aResult)
+{
+  nsresult rv = GetStringBundle();
+  if (m_stringBundle)
+  {
+    nsString tmpVal (aValue);
+    const char16_t *formatStrings[] = { tmpVal.get() };
+
+    nsString result;
+    rv = m_stringBundle->FormatStringFromName(
+      NS_ConvertASCIItoUTF16(aName).get(),
+      formatStrings, 1, getter_Copies(result));
+    aResult.Assign(result);
+  }
+  return rv;
+}
+
+nsresult
+nsImapIncomingServer::GetPrefForServerAttribute(const char *prefSuffix, bool *prefValue)
+{
+  // Any caller of this function must initialize prefValue with a default value
+  // as this code will not set prefValue when the pref does not exist and return
+  // NS_OK anyway
+
+  if (!mPrefBranch)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  NS_ENSURE_ARG_POINTER(prefValue);
+
+  if (NS_FAILED(mPrefBranch->GetBoolPref(prefSuffix, prefValue)))
+    mDefPrefBranch->GetBoolPref(prefSuffix, prefValue);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetCanFileMessagesOnServer(bool *aCanFileMessagesOnServer)
+{
+  NS_ENSURE_ARG_POINTER(aCanFileMessagesOnServer);
+  // Initialize aCanFileMessagesOnServer true, a default value for IMAP
+  *aCanFileMessagesOnServer = true;
+  GetPrefForServerAttribute("canFileMessages", aCanFileMessagesOnServer);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetSearchValue(const nsAString &searchValue)
+{
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetSupportsSubscribeSearch(bool *retVal)
+{
+  NS_ENSURE_ARG_POINTER(retVal);
+  *retVal = false;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetFilterScope(nsMsgSearchScopeValue *filterScope)
+{
+  NS_ENSURE_ARG_POINTER(filterScope);
+  // If the inbox is enabled for offline use, then use the offline filter
+  // scope, else use the online filter scope.
+  //
+  // XXX We use the same scope for all folders with the same incoming server,
+  // yet it is possible to set the offline flag separately for each folder.
+  // Manual filters could perhaps check the offline status of each folder,
+  // though it's hard to see how to make that work since we only store filters
+  // per server.
+  //
+  nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+  nsresult rv = GetRootMsgFolder(getter_AddRefs(rootMsgFolder));
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsCOMPtr<nsIMsgFolder> offlineInboxMsgFolder;
+  rv = rootMsgFolder->GetFolderWithFlags(nsMsgFolderFlags::Inbox |
+                                           nsMsgFolderFlags::Offline,
+                                         getter_AddRefs(offlineInboxMsgFolder));
+
+  *filterScope = offlineInboxMsgFolder ? nsMsgSearchScope::offlineMailFilter
+                                       : nsMsgSearchScope::onlineMailFilter;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetSearchScope(nsMsgSearchScopeValue *searchScope)
+{
+  NS_ENSURE_ARG_POINTER(searchScope);
+ *searchScope = WeAreOffline() ? nsMsgSearchScope::offlineMail : nsMsgSearchScope::onlineMail;
+  return NS_OK;
+}
+
+// This is a recursive function. It gets new messages for current folder
+// first if it is marked, then calls itself recursively for each subfolder.
+NS_IMETHODIMP
+nsImapIncomingServer::GetNewMessagesForNonInboxFolders(nsIMsgFolder *aFolder,
+                                                       nsIMsgWindow *aWindow,
+                                                       bool forceAllFolders,
+                                                       bool performingBiff)
+{
+  NS_ENSURE_ARG_POINTER(aFolder);
+  static bool gGotStatusPref = false;
+  static bool gUseStatus = false;
+
+  bool isServer;
+  (void) aFolder->GetIsServer(&isServer);
+  // Check this folder for new messages if it is marked to be checked
+  // or if we are forced to check all folders
+  uint32_t flags = 0;
+  aFolder->GetFlags(&flags);
+  nsresult rv;
+  nsCOMPtr<nsIMsgImapMailFolder> imapFolder = do_QueryInterface(aFolder, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  bool canOpen;
+  imapFolder->GetCanOpenFolder(&canOpen);
+  if (canOpen && ((forceAllFolders &&
+                 !(flags & (nsMsgFolderFlags::Inbox | nsMsgFolderFlags::Trash |
+                   nsMsgFolderFlags::Junk | nsMsgFolderFlags::Virtual))) ||
+                flags & nsMsgFolderFlags::CheckNew))
+  {
+    // Get new messages for this folder.
+    aFolder->SetGettingNewMessages(true);
+    if (performingBiff)
+      imapFolder->SetPerformingBiff(true);
+    bool isOpen = false;
+    nsCOMPtr <nsIMsgMailSession> mailSession = do_GetService(NS_MSGMAILSESSION_CONTRACTID);
+    if (mailSession && aFolder)
+      mailSession->IsFolderOpenInWindow(aFolder, &isOpen);
+    // eventually, the gGotStatusPref should go away, once we work out the kinks
+    // from using STATUS.
+    if (!gGotStatusPref)
+    {
+      nsCOMPtr<nsIPrefBranch> prefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID);
+      if(prefBranch)
+        prefBranch->GetBoolPref("mail.imap.use_status_for_biff", &gUseStatus);
+      gGotStatusPref = true;
+    }
+    if (gUseStatus && !isOpen)
+    {
+      if (!isServer && m_foldersToStat.IndexOf(imapFolder) == -1)
+        m_foldersToStat.AppendObject(imapFolder);
+    }
+    else
+      aFolder->UpdateFolder(aWindow);
+  }
+
+  // Loop through all subfolders to get new messages for them.
+  nsCOMPtr<nsISimpleEnumerator> enumerator;
+  rv = aFolder->GetSubFolders(getter_AddRefs(enumerator));
+  if (NS_FAILED(rv))
+    return rv;
+
+  bool hasMore;
+  while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMore)) && hasMore)
+  {
+    nsCOMPtr<nsISupports> item;
+    enumerator->GetNext(getter_AddRefs(item));
+
+    nsCOMPtr<nsIMsgFolder> msgFolder(do_QueryInterface(item));
+    if (!msgFolder)
+    {
+      NS_WARNING("Not an nsIMsgFolder");
+      continue;
+    }
+    GetNewMessagesForNonInboxFolders(msgFolder, aWindow, forceAllFolders,
+                                     performingBiff);
+  }
+  if (isServer && m_foldersToStat.Count() > 0)
+    m_foldersToStat[0]->UpdateStatus(this, nullptr);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetArbitraryHeaders(nsACString &aResult)
+{
+  nsCOMPtr <nsIMsgFilterList> filterList;
+  nsresult rv = GetFilterList(nullptr, getter_AddRefs(filterList));
+  NS_ENSURE_SUCCESS(rv,rv);
+  return filterList->GetArbitraryHeaders(aResult);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetShowAttachmentsInline(bool *aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = true; // true per default
+  nsresult rv;
+  nsCOMPtr<nsIPrefBranch> prefBranch = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  prefBranch->GetBoolPref("mail.inline_attachments", aResult);
+  return NS_OK; // In case this pref is not set we need to return NS_OK.
+}
+
+NS_IMETHODIMP nsImapIncomingServer::SetSocketType(int32_t aSocketType)
+{
+  int32_t oldSocketType;
+  nsresult rv = GetSocketType(&oldSocketType);
+  if (NS_SUCCEEDED(rv) && oldSocketType != aSocketType)
+    CloseCachedConnections();
+  return nsMsgIncomingServer::SetSocketType(aSocketType);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::OnUserOrHostNameChanged(const nsACString& oldName,
+                                              const nsACString& newName,
+                                              bool hostnameChanged)
+{
+  nsresult rv;
+  // 1. Do common things in the base class.
+  rv = nsMsgIncomingServer::OnUserOrHostNameChanged(oldName, newName, hostnameChanged);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // 2. Reset 'HaveWeEverDiscoveredFolders' flag so the new folder list can be
+  //    reloaded (ie, DiscoverMailboxList() will be invoked in nsImapProtocol).
+  nsCOMPtr<nsIImapHostSessionList> hostSessionList = do_GetService(kCImapHostSessionListCID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsAutoCString serverKey;
+  rv = GetKey(serverKey);
+  NS_ENSURE_SUCCESS(rv, rv);
+  hostSessionList->SetHaveWeEverDiscoveredFoldersForHost(serverKey.get(), false);
+  // 3. Make all the existing folders 'unverified' so that they can be
+  //    removed from the folder pane after users log into the new server.
+  ResetFoldersToUnverified(nullptr);
+  return NS_OK;
+}
+
+// use canonical format in originalUri & convertedUri
+NS_IMETHODIMP
+nsImapIncomingServer::GetUriWithNamespacePrefixIfNecessary(int32_t namespaceType,
+                                                           const nsACString& originalUri,
+                                                           nsACString& convertedUri)
+{
+  nsresult rv = NS_OK;
+  nsAutoCString serverKey;
+  rv = GetKey(serverKey);
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsCOMPtr<nsIImapHostSessionList> hostSessionList = do_GetService(kCImapHostSessionListCID, &rv);
+  nsIMAPNamespace *ns = nullptr;
+  rv = hostSessionList->GetDefaultNamespaceOfTypeForHost(serverKey.get(), (EIMAPNamespaceType)namespaceType, ns);
+  if (ns)
+  {
+    nsAutoCString namespacePrefix(ns->GetPrefix());
+    if (!namespacePrefix.IsEmpty())
+    {
+      // check if namespacePrefix is the same as the online directory; if so, ignore it.
+      nsAutoCString onlineDir;
+      rv = GetServerDirectory(onlineDir);
+      NS_ENSURE_SUCCESS(rv, rv);
+      if (!onlineDir.IsEmpty())
+      {
+        char delimiter = ns->GetDelimiter();
+          if ( onlineDir.Last() != delimiter )
+            onlineDir += delimiter;
+          if (onlineDir.Equals(namespacePrefix))
+            return NS_OK;
+      }
+
+      MsgReplaceChar(namespacePrefix, ns->GetDelimiter(), '/'); // use canonical format
+      nsCString uri(originalUri);
+      int32_t index = uri.Find("//");           // find scheme
+      index = uri.FindChar('/', index + 2);       // find '/' after scheme
+      // it may be the case that this is the INBOX uri, in which case
+      // we don't want to prepend the namespace. In that case, the uri ends with "INBOX",
+      // but the namespace is "INBOX/", so they don't match.
+      if (MsgFind(uri, namespacePrefix, false, index + 1) != index + 1 &&
+          !MsgLowerCaseEqualsLiteral(Substring(uri, index + 1), "inbox"))
+        uri.Insert(namespacePrefix, index + 1);   // insert namespace prefix
+      convertedUri = uri;
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::GetTrashFolderName(nsAString& retval)
+{
+  nsresult rv = GetUnicharValue(PREF_TRASH_FOLDER_NAME, retval);
+  if (NS_FAILED(rv))
+    return rv;
+  if (retval.IsEmpty())
+    retval = NS_LITERAL_STRING(DEFAULT_TRASH_FOLDER_NAME);
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsImapIncomingServer::SetTrashFolderName(const nsAString& chvalue)
+{
+  // clear trash flag from the old pref
+  nsAutoString oldTrashName;
+  nsresult rv = GetTrashFolderName(oldTrashName);
+  if (NS_SUCCEEDED(rv))
+  {
+    nsAutoCString oldTrashNameUtf7;
+    rv = CopyUTF16toMUTF7(oldTrashName, oldTrashNameUtf7);
+    if (NS_SUCCEEDED(rv))
+    {
+      nsCOMPtr<nsIMsgFolder> oldFolder;
+      rv = GetFolder(oldTrashNameUtf7, getter_AddRefs(oldFolder));
+      if (NS_SUCCEEDED(rv) && oldFolder)
+        oldFolder->ClearFlag(nsMsgFolderFlags::Trash);
+    }
+  }
+  return SetUnicharValue(PREF_TRASH_FOLDER_NAME, chvalue);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetMsgFolderFromURI(nsIMsgFolder *aFolderResource,
+                                          const nsACString& aURI,
+                                          nsIMsgFolder **aFolder)
+{
+  nsCOMPtr<nsIMsgFolder> msgFolder;
+  bool namespacePrefixAdded = false;
+  nsCString folderUriWithNamespace;
+
+  // Check if the folder exists as is...
+  nsresult rv = GetExistingMsgFolder(aURI, folderUriWithNamespace,
+                                     namespacePrefixAdded, false,
+                                     getter_AddRefs(msgFolder));
+
+  // Or try again with a case-insensitive lookup
+  if (NS_FAILED(rv) || !msgFolder)
+    rv = GetExistingMsgFolder(aURI, folderUriWithNamespace,
+                              namespacePrefixAdded, true,
+                              getter_AddRefs(msgFolder));
+
+  if (NS_FAILED(rv) || !msgFolder) {
+    // we didn't find the folder so we will have to create a new one.
+    if (namespacePrefixAdded)
+    {
+      nsCOMPtr <nsIRDFService> rdf = do_GetService("@mozilla.org/rdf/rdf-service;1", &rv);
+      NS_ENSURE_SUCCESS(rv,rv);
+
+      nsCOMPtr<nsIRDFResource> resource;
+      rv = rdf->GetResource(folderUriWithNamespace, getter_AddRefs(resource));
+      NS_ENSURE_SUCCESS(rv,rv);
+
+      nsCOMPtr <nsIMsgFolder> folderResource;
+      folderResource = do_QueryInterface(resource, &rv);
+      NS_ENSURE_SUCCESS(rv,rv);
+      msgFolder = folderResource;
+    }
+    else
+      msgFolder = aFolderResource;
+  }
+
+  msgFolder.swap(*aFolder);
+  return NS_OK;
+}
+
+nsresult
+nsImapIncomingServer::GetExistingMsgFolder(const nsACString& aURI,
+                                           nsACString& aFolderUriWithNamespace,
+                                           bool& aNamespacePrefixAdded,
+                                           bool aCaseInsensitive,
+                                           nsIMsgFolder **aFolder)
+{
+  nsCOMPtr<nsIMsgFolder> rootMsgFolder;
+  nsresult rv = GetRootMsgFolder(getter_AddRefs(rootMsgFolder));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  aNamespacePrefixAdded = false;
+  // Check if the folder exists as is...Even if we have a personal namespace,
+  // it might be in another namespace (e.g., shared) and this will catch that.
+  rv = rootMsgFolder->GetChildWithURI(aURI, true, aCaseInsensitive, aFolder);
+
+  // If we couldn't find the folder as is, check if we need to prepend the
+  // personal namespace
+  if (!*aFolder)
+  {
+    GetUriWithNamespacePrefixIfNecessary(kPersonalNamespace, aURI,
+                                         aFolderUriWithNamespace);
+    if (!aFolderUriWithNamespace.IsEmpty())
+    {
+      aNamespacePrefixAdded = true;
+      rv = rootMsgFolder->GetChildWithURI(aFolderUriWithNamespace, true,
+                                          aCaseInsensitive, aFolder);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::CramMD5Hash(const char *decodedChallenge, const char *key, char **result)
+{
+  NS_ENSURE_ARG_POINTER(decodedChallenge);
+  NS_ENSURE_ARG_POINTER(key);
+
+  unsigned char resultDigest[DIGEST_LENGTH];
+  nsresult rv = MSGCramMD5(decodedChallenge, strlen(decodedChallenge), key, strlen(key), resultDigest);
+  NS_ENSURE_SUCCESS(rv, rv);
+  *result = (char *) malloc(DIGEST_LENGTH);
+  if (*result)
+    memcpy(*result, resultDigest, DIGEST_LENGTH);
+  return (*result) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetLoginUsername(nsACString &aLoginUsername)
+{
+  return GetRealUsername(aLoginUsername);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetOriginalUsername(nsACString &aUsername)
+{
+  return GetUsername(aUsername);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetServerKey(nsACString &aServerKey)
+{
+  return GetKey(aServerKey);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetServerPassword(nsACString &aPassword)
+{
+  return GetPassword(aPassword);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::RemoveServerConnection(nsIImapProtocol* aProtocol)
+{
+  return RemoveConnection(aProtocol);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::GetServerShuttingDown(bool* aShuttingDown)
+{
+  return GetShuttingDown(aShuttingDown);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::ResetServerConnection(const nsACString& aFolderName)
+{
+  return ResetConnection(aFolderName);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetServerDoingLsub(bool aDoingLsub)
+{
+  return SetDoingLsub(aDoingLsub);
+}
+
+NS_IMETHODIMP
+nsImapIncomingServer::SetServerForceSelect(const nsACString &aForceSelect)
+{
+  return SetForceSelect(aForceSelect);
+}