diff --git a/mail/locales/en-US/chrome/messenger/messenger.properties b/mail/locales/en-US/chrome/messenger/messenger.properties
index 9130237f0a5d..27a182ef659c 100644
--- a/mail/locales/en-US/chrome/messenger/messenger.properties
+++ b/mail/locales/en-US/chrome/messenger/messenger.properties
@@ -107,7 +107,8 @@ operationFailedFolderBusy=The operation failed because an other operation is usi
 folderRenameFailed=The folder could not be renamed. Perhaps the folder is being reparsed, or the new name is not a valid folder name.
 # LOCALIZATION NOTES(verboseFolderFormat): %1$S is folder name, %2$S is server name
 verboseFolderFormat=%1$S on %2$S
-filterFolderTruncateFailed=There was an error truncating the Inbox after filtering a message to folder '%S'. You may need to shutdown Mozilla and delete INBOX.msf.
+# LOCALIZATION NOTES(filterFolderTruncateFailed): %1$S is replaced by the folder name, %2$S is replaced by the brandShortName
+filterFolderTruncateFailed=There was an error truncating the Inbox after filtering a message to folder '%1$S'. You may need to shutdown %2$S and delete INBOX.msf.
 
 defaultServerTag=(Default)
 useDefaultServer=Use default server
diff --git a/mailnews/base/resources/locale/en-US/messenger.properties b/mailnews/base/resources/locale/en-US/messenger.properties
index e028b91efdaf..b2a4c930b607 100644
--- a/mailnews/base/resources/locale/en-US/messenger.properties
+++ b/mailnews/base/resources/locale/en-US/messenger.properties
@@ -105,7 +105,8 @@ operationFailedFolderBusy=The operation failed because an other operation is usi
 folderRenameFailed=The folder could not be renamed. Perhaps the folder is being reparsed, or the new name is not a valid folder name.
 # LOCALIZATION NOTES(verboseFolderFormat): %1$S is folder name, %2$S is server name
 verboseFolderFormat=%1$S on %2$S
-filterFolderTruncateFailed=There was an error truncating the Inbox after filtering a message to folder '%S'. You may need to shutdown Mozilla and delete INBOX.msf.
+# LOCALIZATION NOTES(filterFolderTruncateFailed): %1$S is replaced by the folder name, %2$S is replaced by the brandShortName
+filterFolderTruncateFailed=There was an error truncating the Inbox after filtering a message to folder '%1$S'. You may need to shutdown %2$S and delete INBOX.msf.
 
 defaultServerTag=(Default)
 useDefaultServer=Use default server
diff --git a/mailnews/base/util/nsMsgDBFolder.cpp b/mailnews/base/util/nsMsgDBFolder.cpp
index 8d21a021e144..15e82f34efbd 100644
--- a/mailnews/base/util/nsMsgDBFolder.cpp
+++ b/mailnews/base/util/nsMsgDBFolder.cpp
@@ -121,6 +121,7 @@ PRUnichar *nsMsgDBFolder::kLocalizedDraftsName;
 PRUnichar *nsMsgDBFolder::kLocalizedTemplatesName;
 PRUnichar *nsMsgDBFolder::kLocalizedUnsentName;
 PRUnichar *nsMsgDBFolder::kLocalizedJunkName;
+PRUnichar *nsMsgDBFolder::kLocalizedBrandShortName;
 
 nsrefcnt nsMsgDBFolder::mInstanceCount=0;
 
@@ -200,6 +201,7 @@ nsMsgDBFolder::~nsMsgDBFolder(void)
     CRTFREEIF(kLocalizedTemplatesName);
     CRTFREEIF(kLocalizedUnsentName);
     CRTFREEIF(kLocalizedJunkName);
+    CRTFREEIF(kLocalizedBrandShortName);
 #ifdef MSG_FASTER_URI_PARSING
     mParsingURL = nsnull;
 #endif
@@ -2143,6 +2145,14 @@ nsMsgDBFolder::initializeStrings()
                             &kLocalizedJunkName);
   bundle->GetStringFromName(NS_LITERAL_STRING("unsentFolderName").get(),
                             &kLocalizedUnsentName);
+
+  nsCOMPtr<nsIStringBundle> brandBundle;
+  rv = bundleService->CreateBundle("chrome://branding/locale/brand.properties", getter_AddRefs(bundle));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  bundle->GetStringFromName(NS_LITERAL_STRING("brandShortName").get(),
+                            &kLocalizedBrandShortName);
+
   return NS_OK;
 }
 
@@ -4765,10 +4775,11 @@ nsMsgDBFolder::GetStringWithFolderNameFromBundle(const char *msgName, PRUnichar
     GetName(getter_Copies(folderName));
     const PRUnichar *formatStrings[] =
     {
-      folderName
+      folderName,
+      kLocalizedBrandShortName
     };
     rv = bundle->FormatStringFromName(NS_ConvertASCIItoUCS2(msgName).get(),
-                                      formatStrings, 1, aResult);
+                                      formatStrings, 2, aResult);
   }
   return rv;
 }
diff --git a/mailnews/base/util/nsMsgDBFolder.h b/mailnews/base/util/nsMsgDBFolder.h
index 0993a9bff96c..dcbae9678eb8 100644
--- a/mailnews/base/util/nsMsgDBFolder.h
+++ b/mailnews/base/util/nsMsgDBFolder.h
@@ -246,6 +246,7 @@ protected:
   static NS_MSG_BASE_STATIC_MEMBER_(PRUnichar*) kLocalizedTemplatesName;
   static NS_MSG_BASE_STATIC_MEMBER_(PRUnichar*) kLocalizedUnsentName;
   static NS_MSG_BASE_STATIC_MEMBER_(PRUnichar*) kLocalizedJunkName;
+  static NS_MSG_BASE_STATIC_MEMBER_(PRUnichar*) kLocalizedBrandShortName;
   
   static NS_MSG_BASE_STATIC_MEMBER_(nsIAtom*) kTotalUnreadMessagesAtom;
   static NS_MSG_BASE_STATIC_MEMBER_(nsIAtom*) kBiffStateAtom;