From: Wietse Venema (wietseporcupine.org)
Date: Wed Nov 05 2008 - 15:07:26 CST

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Matheus Lima:
> Recently, withou any changing in my configurations, the e-mail send to any
> gmail accounts are getting deferred:
>
> Nov 5 18:00:38 tampa postfix/smtp[5687]: 88D6A48F2: to=<guimapiggmail.com>,
> relay=gmail-smtp-in.l.google.com[72.14.205.27]:25, delay=2189,
> delays=2186/0.01/2.6/0.54, dsn=4.5.0, status=deferred (host
> gmail-smtp-in.l.google.com[72.14.205.27] said: 451 4.5.0 SMTP protocol
> violation, see RFC 2821 k27si638904qba.10 (in reply to end of DATA command))
>
> The problem is only with gmail.

Try:

# postconf -e smtp_discard_ehlo_keywords=pipelining
# postfix reload

If this solves the problem, Google has screwed up their support
for RFC 2920 command pipelining.

        Wietse

> PS.: My server receive any e-mail from any gmail account, the problem is
> olny sending. The most fucking issue is that two e-mails that a sended among
> various, surprisinly were sent:
>
> one of them is:
> Nov 5 17:40:40 tampa postfix/smtp[4601]: D2E7448D4: to=<guimapiggmail.com>,
> relay=gmail-smtp-in.l.google.com[72.14.205.27]:25, delay=1753,
> delays=1748/3.1/0.79/0.99, dsn=2.0.0, status=sent (250 2.0.0 OK 1225914048
> k8si588760qba.5)
>
> WFT?

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