Date: Sat, 25 Feb 2012 13:03:14 -0500 From: Jon Radel <jon@radel.com> To: "Bender, Chris" <chris_bender@cellularatsea.com> Cc: freebsd-questions@freebsd.org Subject: Re: Email issues, relay failure Message-ID: <4F492262.5090505@radel.com> In-Reply-To: <assp.0402aabdb0.863259E16B6C464DAD1E9DD10BB31154059CFBF4@wmsexg01.corp.cellularatsea.com> References: <863259E16B6C464DAD1E9DD10BB31154059CFBAE@wmsexg01.corp.cellularatsea.com> <4F48BAF6.9070204@ifdnrg.com> <863259E16B6C464DAD1E9DD10BB31154059CFBE7@wmsexg01.corp.cellularatsea.com> <4F48EC21.7040805@ifdnrg.com> <863259E16B6C464DAD1E9DD10BB31154059CFBEE@wmsexg01.corp.cellularatsea.com> <4F48F45F.4080304@ifdnrg.com> <assp.0402aabdb0.863259E16B6C464DAD1E9DD10BB31154059CFBF4@wmsexg01.corp.cellularatsea.com>
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This is a cryptographically signed message in MIME format. --------------ms070607080608030900060107 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable On 2/25/12 10:26 AM, Bender, Chris wrote: > > On telnet w IP it says unable to connect. =2E.. > Its weird that the delivery on A says deferred connection timed out but= on tcpdump I see the port 25 If you can't establish a TCP connection from A to your relay server on=20 port 25, I'd expect all of the above. If you can't establish a TCP=20 connection to port 25 at all from A, I'd stop focusing on the details of = the e-mail server on the relay machine (as they're likely to be beside=20 the point) and start focusing on what is blocking the traffic from A.=20 Have you audited all the firewalls involved? To be really focused, if=20 you see traffic (both ways) at the relay server when A tries to talk to=20 port 25, but A is convinced that no TCP connection is established,=20 either you're stomping on things at the relay server (do your attempts=20 to telnet to port 25 fail immediately or just sit there for a good long=20 time and then fail?), the reply packets from relay to A are getting=20 mis-routed, or A is ignoring the packets coming in from the relay. Can=20 you ping from the relay to A? There's a distinct difference between failure to establish a TCP=20 connection (look to the network stuff) and the e-mail server giving you=20 an error response rejecting your attempt to transfer mail or just=20 quietly loosing the mail (look to the e-mail servers). --=20 --Jon Radel jon@radel.com --------------ms070607080608030900060107--
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