X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] Return-Path: Received: from [66.192.64.130] (HELO jackrouse.com) by mail.stalker.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 58657287 for CGatePro@mail.stalker.com; Thu, 04 Feb 2010 08:07:44 -0800 Received-SPF: none receiver=mail.stalker.com; client-ip=66.192.64.130; envelope-from=pgalati@jackrouse.com Received: from [192.168.1.175] (HELO FC.JackRouse.com) by jackrouse.com (CommuniGate Pro SMTP 5.3.2 _community_) with ESMTP id 3055380 for CGatePro@mail.stalker.com; Thu, 04 Feb 2010 11:07:04 -0500 Message-id: Date: Thu, 04 Feb 2010 11:06:54 -0500 Subject: Re: Failed to receive message body X-Mailer: FirstClass 9.1 (build 9.221) X-FC-SERVER-TZ: 15729388 To: "CommuniGate Pro Discussions" From: "Paul Galati" References: <,> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit "CommuniGate Pro Discussions" on February 3, 2010 at 8:44 AM -0500 wrote: >Note that in both cases the reported errors are related to connection >problems (the connection was explicitly reset by the remote peer, or it >was dead for 5 minutes). This may indicate a problem with the network or >an activity of some anti-virus or a like working on the SMTP level. The problem was stemming from our Cisco ASA 5505 ESMTP inspection filter. Evidently there is a known 998 byte default that has been causing problems. Once I turned that inspection off, mail flowed like brand new pipe, except for Yahoo which is not our fault. I have been informed that because I disabled the ESMTP inspection, outside people, if they knew how, could access the server via telnet on port 25 and possibly send mail through that. Is this true and if so, what might I do to prevent or decrease the chances of an uninvited guest relaying through my server. Thanks for your time. Paul