Hi,
I'm more or less new to postmastering and I'm facing some errors displayed below. I reached the fellow postmaster of the receiving server and he said that recipient address verification could cause the problem and attached for me his postfix error log. > May 6 22:39:17 receivingmailserver postfix/smtpd[37426]: too many errors > after RCPT from mail.example.com[4.2.3.1] Since I'm not familiar with recipient address verification, I've read the docs though, but can't clearly understand / decide if the error comes from recipient verification probing or something else. Is it good to have it or it should be disabled it? Which is the best practice? > Here's my log: > > May 6 22:19:16 mail postfix/smtp[3857]: C3433140E0F: host mail.example.com[] > said: 450 4.2.0 <us...@med.example.com>: Recipient address rejected: > Greylisted, see http://postgrey.schweikert.ch/help/med.example.com.html (in > reply to RCPT TO command) > May 6 22:19:16 mail postfix/smtp[3857]: C3433140E0F: host > mail.example.com[1.2.3.4] said: 421 4.7.0 mail.example.com Error: too many > errors (in reply to RCPT TO command) > May 6 22:19:16 mail postfix/smtp[3857]: C3433140E0F: lost connection with > mail.example.com[1.2.3.4] while sending DATA command > May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: > to=<us...@med.example.com>, relay=mail.example.com[1.2.3.4]:25, delay=3983, > delays=3980/0.03/2/0.41, dsn=4.2.0, status=deferred (host > mail.example.com[1.2.3.4] said: 450 4.2.0 <us...@med.example.com>: Recipient > address rejected: Greylisted, see > http://postgrey.schweikert.ch/help/med.example.com.html (in reply to RCPT TO > command)) > May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: > to=<us...@med.example.com>, relay=mail.example.com[1.2.3.4]:25, delay=3983, > delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host > mail.example.com[1.2.3.4] said: 421 4.7.0 mail.example.com Error: too many > errors (in reply to DATA command)) > May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: > to=<us...@med.example.com>, relay=mail.example.com[1.2.3.4]:25, delay=3983, > delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host > mail.example.com[1.2.3.4] said: 421 4.7.0 mail.example.com Error: too many > errors (in reply to DATA command)) > May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: > to=<us...@med.example.com>, relay=mail.example.com[1.2.3.4]:25, delay=3983, > delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host > mail.example.com[1.2.3.4] said: 421 4.7.0 mail.example.com Error: too many > errors (in reply to DATA command)) > May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: > to=<us...@med.example.com>, relay=mail.example.com[1.2.3.4]:25, delay=3983, > delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host > mail.example.com[1.2.3.4] said: 421 4.7.0 mail.example.com Error: too many > errors (in reply to DATA command)) Thanks, Chris May 6 22:19:16 mail postfix/smtp[3857]: C3433140E0F: host mail.duth.gr [1][192.108.114.110] said: 450 4.2.0 <emano...@med.duth.gr>: Recipient address rejected: Greylisted, see http://postgrey.schweikert.ch/help/med.duth.gr.html [2] (in reply to RCPT TO command) May 6 22:19:16 mail postfix/smtp[3857]: C3433140E0F: host mail.duth.gr [1][192.108.114.110] said: 421 4.7.0 mail.duth.gr [1] Error: too many errors (in reply to RCPT TO command) May 6 22:19:16 mail postfix/smtp[3857]: C3433140E0F: lost connection with mail.duth.gr [1][192.108.114.110] while sending DATA command May 6 22:39:15 mail postfix/smtp[4443]: connect to mail.duth.gr [1][2001:648:2e80::110]:25: Network is unreachable May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: to=<gkol...@med.duth.gr>, relay=mail.duth.gr [1][192.108.114.110]:25, delay=3983, delays=3980/0.03/2/0.41, dsn=4.2.0, status=deferred (host mail.duth.gr [1][192.108.114.110] said: 450 4.2.0 <gkol...@med.duth.gr>: Recipient address rejected: Greylisted, see http://postgrey.schweikert.ch/help/med.duth.gr.html [2] (in reply to RCPT TO command)) May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: to=<pol...@med.duth.gr>, relay=mail.duth.gr [1][192.108.114.110]:25, delay=3983, delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host mail.duth.gr [1][192.108.114.110] said: 421 4.7.0 mail.duth.gr [1] Error: too many errors (in reply to DATA command)) May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: to=<achat...@med.duth.gr>, relay=mail.duth.gr [1][192.108.114.110]:25, delay=3983, delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host mail.duth.gr [1][192.108.114.110] said: 421 4.7.0 mail.duth.gr [1] Error: too many errors (in reply to DATA command)) May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: to=<atav...@med.duth.gr>, relay=mail.duth.gr [1][192.108.114.110]:25, delay=3983, delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host mail.duth.gr [1][192.108.114.110] said: 421 4.7.0 mail.duth.gr [1] Error: too many errors (in reply to DATA command)) May 6 22:39:17 mail postfix/smtp[4443]: C3433140E0F: to=<emano...@med.duth.gr>, relay=mail.duth.gr [1][192.108.114.110]:25, delay=3983, delays=3980/0.03/2/0.41, dsn=4.7.0, status=deferred (host mail.duth.gr [1][192.108.114.110] said: 421 4.7.0 mail.duth.gr [1] Error: too many errors (in reply to DATA command)) Links: ------ [1] http://mail.duth.gr [2] http://postgrey.schweikert.ch/help/med.duth.gr.html
