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

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);
 pref("mail.nntp.qos", 0);
 
 // default value for IMAP4

# HG changeset patch
# Parent 721cec51e68558ab41a21d7f3db1b7de0e20f3bd
# User Sukhbir Singh <sukhbir.in@gmail.com>
Set the default preferences for the patches (https://bugzilla.mozilla.org/show_bug.cgi?id=776397)

