Date: Sat, 25 Feb 2012 13:39:02 -0500 From: "Bender, Chris" <chris_bender@cellularatsea.com> To: "Jon Radel" <jon@radel.com> Cc: freebsd-questions@freebsd.org Subject: Re: Email issues, relay failure Message-ID: <assp.0402e4e783.7409DAB4-F76A-493B-9A50-A663E6F6802E@cellularatsea.com> In-Reply-To: <4F492262.5090505@radel.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> <863259E16B6C464DAD1E9DD10BB31154059CFBF4@wmsexg01.corp.cellularatsea.com> <4F492262.5090505@radel.com>
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Hi Jon Thanks. There aren't any firewalls between the devices but they are far= apart. I can telnet from x to a and I can ssh from a to x.=20 I think you are right in focusing on the connection time out from A to= X , i looked on X for a service that isnt running Which makes this fail but I am not sure=20 Which services. I see postfix and sendmail running and I have restarted= them. I never see mail delivery from A in mailog on X Thanks On Feb 25, 2012, at 1:03 PM, "Jon Radel" <jon@radel.com> wrote: > On 2/25/12 10:26 AM, Bender, Chris wrote: >=20 >>=20 >> On telnet w IP it says unable to connect. > ... >> Its weird that the delivery on A says deferred connection timed out= but on tcpdump I see the port 25 >=20 >=20 > If you can't establish a TCP connection from A to your relay server= on port 25, I'd expect all of the above. If you can't establish a TCP= 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 besi= de the point) and start focusing on what is blocking the traffic from= A. Have you audited all the firewalls involved? To be really focused,= if you see traffic (both ways) at the relay server when A tries to talk= to port 25, but A is convinced that no TCP connection is established,= either you're stomping on things at the relay server (do your attempts= to telnet to port 25 fail immediately or just sit there for a good long= time and then fail?), the reply packets from relay to A are getting mis= -routed, or A is ignoring the packets coming in from the relay. Can you= ping from the relay to A? >=20 > There's a distinct difference between failure to establish a TCP conne= ction (look to the network stuff) and the e-mail server giving you an= error response rejecting your attempt to transfer mail or just quietly= loosing the mail (look to the e-mail servers). >=20 > --=20 > --Jon Radel > jon@radel.com >=20
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