From: Alexander Grüner (agruenergmx.de)
Date: Tue Aug 08 2006 - 07:15:03 CDT

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Hello :-)

I have a random problem with a MX at web.de (a large mail provider in
germany). I changed the real email adresses in this log.

My postfix log shows:

usermx:~> sudo grep 362812AFE4 /var/log/mail

Aug 8 13:02:41 ns3 postfix/smtpd[2321]: 362812AFE4:
client=localhost[127.0.0.1]
Aug 8 13:02:41 ns3 postfix/cleanup[2397]: 362812AFE4:
message-id=<OF286537C7.3776082F-ONC12571C4.003C43FA-C12571C4.003CAAF2mydomain.de>
Aug 8 13:02:41 ns3 postfix/qmgr[2211]: 362812AFE4:
from=<usermydomain.de>, size=1739, nrcpt=1 (queue active)
Aug 8 13:02:41 ns3 postfix/smtp[2255]: A526227C33: to=<userweb.de>,
relay=127.0.0.1[127.0.0.1], delay=1, status=sent (250 2.6.0 Ok,
id=02479-02, from MTA: 250 Ok: queued as 362812AFE4)
Aug 8 13:02:41 ns3 postfix/smtp[2214]: 362812AFE4: to=<userweb.de>,
relay=mx-ha01.web.de[217.72.192.149], delay=0, status=bounced (host
mx-ha01.web.de[217.72.192.149] said: 550 Protocol violation (in reply to
DATA command))
Aug 8 13:02:41 ns3 postfix/qmgr[2211]: 362812AFE4: removed

I am running a postfix-2.1.5-3.4 on SuSE Linux 9.2 (normal rpm from SuSE
Online Update).

In July I already had 4 similar incidents with these servers:

sudo zgrep "550 Protocol violation (in reply to DATA command)"
mail-200607*.gz

mail-20060705.gz:Jul 4 14:09:25 ns3 postfix/smtp[898]: 051FB27C4A:
to=<hugo123web.de>, relay=mx-ha01.web.de[217.72.192.149], delay=0,
status=bounced (host mx-ha01.web.de[217.72.192.149] said: 550 Protocol
violation (in reply to DATA command))
mail-20060708.gz:Jul 7 08:35:12 ns3 postfix/smtp[30073]: E719E2EB1C:
to=<adam123web.de>, relay=mx-ha02.web.de[217.72.192.188], delay=3,
status=bounced (host mx-ha02.web.de[217.72.192.188] said: 550 Protocol
violation (in reply to DATA command))
mail-20060708.gz:Jul 7 08:37:29 ns3 postfix/smtp[30070]: 1FB522EB1A:
to=<adam123web.de>, relay=mx-ha01.web.de[217.72.192.149], delay=0,
status=bounced (host mx-ha01.web.de[217.72.192.149] said: 550 Protocol
violation (in reply to DATA command))
mail-20060718.gz:Jul 17 11:07:55 ns3 postfix/smtp[28337]: CDC902EBA7:
to=<peter123web.de>, relay=mx-ha01.web.de[217.72.192.149], delay=8,
status=bounced (host mx-ha01.web.de[217.72.192.149] said: 550 Protocol
violation (in reply to DATA command))

Is the problem here or at web.de ? Normally postfix works fine with
thousands of mails per day.

Regards,
Alexander

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