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=, 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? Thank you! Antonio
