Im getting this reply when I send email. Same issue in all account in WHM.
I have no problem with the other WHM with the same tweak setting under mail.
Sender: Mail Delivery System
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
retry timeout exceeded
------ This is a copy of the message, including all the headers. ------
Received: from [::1] (helo=[18.104.22.168])
by server.paolocatalan.com with esmtpa (Exim 4.69)
id 1RrmBW-0007mI-T4; Mon, 30 Jan 2012 08:01:54 +0000
Received: from 22.214.171.124 ([126.96.36.199])
(SquirrelMail authenticated user firstname.lastname@example.org)
by 188.8.131.52 with HTTP;
Mon, 30 Jan 2012 08:01:54 -0000
Date: Mon, 30 Jan 2012 08:01:54 -0000
Subject: squirrel mail
X-Priority: 3 (Normal)
Any idea? Appreciate your help.