 diff --git a/mailnews/mailnews.js b/mailnews/mailnews.js
 --- a/mailnews/mailnews.js
 +++ b/mailnews/mailnews.js
-@@ -812,8 +812,15 @@ pref("mail.smtp.qos", 0);
+@@ -814,8 +814,16 @@ pref("mail.smtp.qos", 0);
  pref("mail.nntp.qos", 0);
  
  // default value for IMAP4

# HG changeset patch
# Parent 5f659702021e2d505c40ac4d452e80fe0b7be590
# User Sukhbir Singh <sukhbir.in@gmail.com>
Set the default preferences for the patches (https://bugzilla.mozilla.org/show_bug.cgi?id=776397)


+
+// Allow a custom message-ID to be set through an extension.
+pref("mailnews.custom_message_id", false);
+pref("mailnews.header.custom_message_id", "");
