Status - Deferred. SMTP error 451
I see some messages in log files like this. STATUS - DEFERRED
Is something wrong with configuration of my server?
May 24 09:32:36 corp postfix/smtp: 78F121BBCD04: host mx.tplants.com[126.96.36.199] said: 451-188.8.131.52 is not yet authorized to deliver mail from 451 <firstname.lastname@example.org> to <email@example.com>. Please try later. (in reply to RCPT TO command)
May 24 09:32:39 corp postfix/smtp: 78F121BBCD04: to=<firstname.lastname@example.org>, relay=mx2.tplants.com[184.108.40.206]:25, delay=9.3, delays=0.1/0.01/6.1/3.1, dsn=4.0.0, status=deferred (host mx2.tplants.com[220.127.116.11] said: 451-18.104.22.168 is not yet authorized to deliver mail from 451 <email@example.com> to <firstname.lastname@example.org>. Please try later. (in reply to RCPT TO command))
#2489 (address verification yields 451)
I found that
Server should accept mail with an Envelope-Sender of <> (the null address), used
for processing bounce messages and an Envelope-Recipient of the sender of
Does it accept?
What do I do with message 451 ? And why the message is DEFERRED?
What means "not yet authorized" ?
thanks in advance
SMTP error 4.7.1. Is there a problem with Zimbra sending server?
I got a message deferred with error code 451 - 4.7.1.
Here I found that this is always antivirus/antispam problem with sending server.
Here is a line from zimbra.log file
May 25 15:21:12 corp postfix/smtp: 4C5661BBCE95: to=<email@example.com>, relay=krug-sec.krugcorp.ru[22.214.171.124]:25, delay=4.9, delays=0.09/0.01/0.06/4.7, dsn=4.7.1, status=deferred (host krug-sec.krugcorp.ru[126.96.36.199] said: 451 4.7.1 Wait-wait, It'll be ok soon...Maybe ) (in reply to RCPT TO command))
Is there a problem? What do I do with that?