I've been trucking along just fine until last Thursday, then this error pops up for multiple accounts on my server to multiple accounts to that domain. All other mail flows like a river.
I've preformed no updates to the OS nor ZCS since I moved from 7.1.3 to 7.1.4 several weeks ago.
Feb 28 08:44:17 mail postfix/smtp: 42388A2C151: to=<some.user@LumpkinCounty.GOV>, relay=mail.lumpkincounty.gov[188.8.131.52]:25, delay=67611, delays=67608/0.27/3/0.15, dsn=4.0.0, status=deferred (host mail.lumpkincounty.gov[184.108.40.206] said: 451 Temporary local problem - please try later (in reply to end of DATA command))
If I send a test message to email@example.com, then I get a 550 Authentication Required bounce from that server.
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
497AFA2C055 4697 Tue Feb 28 08:58:14 firstname.lastname@example.org
(host mail.LumpkinCounty.GOV[220.127.116.11] said: 451 Temporary local problem - please try later (in reply to end of DATA command))
I'm running :
One last bit of information, I have emptied the deferred queue of the messages going to the lumpkincounty.gov domain and created a new message just from me to their admin, and it still gave me the same error. I was concerned about one of the messages being "corrupt" and causing the issue, but that isn't the case it seems.
Linux mail 2.6.32-24-server #43-Ubuntu SMP Thu Sep 16 16:05:42 UTC 2010 x86_64 GNU/Linux
Ubuntu 10.04.4 LTS
Release 7.1.4_GA_2555.UBUNTU10_64 UBUNTU10_64 FOSS edition.
If anyone else out there has a (sort of) exact system as mine (see above). I'd like to give you a test e-mail address to send to just to see what happens on your system. Just send me a PM.