Am 30.09.2011 18:23, schrieb ajm: > > > If pix workarounds are out of question, I think just DNS remains. > > On DNS I have currently: > > nslookup -query=MX domain - returns only an MX_server - the correct one > nslookup MX_server - returns the correct ip address > nslookup ip_address - returns the name of a machine from the same > domain, but not the MX_server. > > Even if the reverse resolution does not point to exactly the same name > (there are CNAMEs), it resolves to the same domain. > I thought it would be enough, as I did never need more than this before, > but then this is probably the problem. > > Thank you for your help! > > > > > On Fri, 30 Sep 2011 11:15:07 -0500, Noel Jones <njo...@megan.vbhcs.org> > wrote: >> On 9/30/2011 10:49 AM, ajm wrote: >>> Hello! >>> >>> >>> >>> I recently installed a new mail server with postfix 2.8.2. This >>> machine replaced an older one, with nearly the same features and >>> configurations. >>> >>> >>> >>> Since that, however, I'm experimenting problems to send emails to >>> only one destination. Logs show: >>> >>> >>> >>> Sep 28 18:51:27 mailserver postfix/smtp[21279]: 3418C61EE1: enabling >>> PIX workarounds: disable_esmtp delay_dotcrlf for >>> oa.pt[213.146.196.92]:25 >>> >>> >>> >>> Sep 28 18:51:47 mailserver postfix/smtp[21279]: >>> 3418C61EE1: to=<x...@adv.oa.pt>, relay=oa.pt[213.146.196.92]:25, >>> delay=3207, delays=3167/0/20/20, dsn=4.0.0, status=deferred (host >>> oa.pt[213.146.196.92] said: 421 DNS temporary failure at return MX >>> check, try again later (#4.3.0) (in reply to MAIL FROM command)) >>> >>> >>> >>> I started checking for DNS problems. Everything seems to be correct, >>> both A and MX records, as well as reverse resolution. >>> >>> I already tried to disable pix workarounds, as older version didn't >>> have this feature and worked well, but there were no changes in >>> results. Can somebody please help me on this subject? >>> >>> >> >> The server at 213.146.196.92 is refusing your mail; only they can >> give you an authoritative answer why. >> >> From the message returned, I assume they are doing an MX lookup on >> the MAIL FROM domain, and that lookup fails. This doesn't have >> anything to do with the pix workarounds. >> >> >> -- Noel Jones
dont top post use dig for lookups better with real world examples mx entries in dns are no secrets after all i think your question was allready answered by Noel -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
