We upgraded to Exchange 2013 about a year ago. Since that time we've been having issues with certain companies having their mail delayed or rejected when sending to us. No problems us sending to them though. Eventually through troubleshooting I have determined that all of these different companies have one thing in common: a barracuda firewall.
In the year since the installation I have updated Exchange all the way to SP1 but we still have this issue. The messages usually arrive to us, but quite often a day later, etc. Here is the message from one from the 26th that was rejected:
#< #4.0.0 X-Spam-&-Virus-Firewall; conversation withmail.domain.ca[64.46.58.226] timed out while sending MAIL FROM> #SMTP#
Original message headers:
X-ASG-Debug-ID: 1406427098-0499ef4412c2d00001-3TTufb
Received: from DEVPMTLEXC2.devp.org ([192.168.1.202]) bybarracuda.devp.org
with ESMTP id EiJxT4ex1jxAnxdL; Sat, 26 Jul 2014 22:11:38 -0400 (EDT)
X-Barracuda-Envelope-From: sfarid@domain.org
X-ASG-Whitelist: Client
Received: from DEVPMTLEXC2.devp.org ([192.168.1.202]) byDEVPMTLEXC2.devp.org
([192.168.1.202]) with mapi id 14.03.0195.001; Sat, 26 Jul 2014 22:11:37
-0400
From: "Farid, Sara" <sfarid@domain.org>
To: >
Subject:
X-ASG-Orig-Subj:
Thread-Index: AQHPqUAYJnlCbEpneUasDGYYczT9uw==
Date: Sun, 27 Jul 2014 02:11:37 +0000
Message-ID: <7FA4F015-3A8D-4D73-9357-AED074A05ECF@devp.org>
References: <846f2dbfee6d4080bcb76e692630c28b@S8EX1.network.caedm.ca>,<D9CD7F544E613C4A98E045EA5E3667C327657C39@DEVPMTLEXC2.devp.org>,<285A3ABB-E739-4849-828E-41E366F0AA7F@devp.org>
In-Reply-To: <285A3ABB-E739-4849-828E-41E366F0AA7F@devp.org>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
Content-Type: multipart/mixed;
boundary="_015_7FA4F0153A8D4D739357AED074A05ECFdevporg_"
MIME-Version: 1.0
X-Barracuda-Connect: UNKNOWN[192.168.1.202]
X-Barracuda-Start-Time: 1406427098
X-Barracuda-URL: http://172.16.1.200:8000/cgi-mod/mark.cgi
X-Virus-Scanned: by bsmtpd at devp.org
X-Barracuda-BRTS-Status: 1
Our Environment:
2x Exchange 2013 Std. SP1 Servers, All roles, DAG. We only use the built-in Exchange tools for anti-spam, traffic flows to and from exchange directly through NAT.