Temporary MTA failure on relaying (rw_loop)

[Patrick Ben Koetter]

* Alex <mysqlstudent at gmail.com>:
> Hi all,
> 
> I'm using amavisd-new-2.8.1 on fedora20 and I've started to occasionally
> find the following in the logs:
> 
> May 28 09:39:38 mail03 postfix/smtp[14293]: 4D45560B4A0: to=<33141 at example.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=43, delays=0.79/0.29/0.56/41, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=16881-01 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.021 s): id=16881-01 (in reply to end of DATA command))

Postfix smtp client attempts to send a message to amavis. amavis defers the
message, because it can't forward it to the next hop. (amavis has no queue. A
client sends a message to amavis. amavis inspects and forwards it. Then it
tells the sending client it will accept the message. This way a message cannot
be lost.)

> May 28 09:39:39 mail03 postfix/cleanup[16722]: DE58B60B4CD: message-id=<
> 3gdtSV07N9z66Vd at mr5.mr.bmdeda99.com>
> May 28 09:39:39 mail03 amavis[16885]: (16885-01) (!)rw_loop: leaving rw
> loop, no progress, last event (select) 35.035 s ago
> May 28 09:39:39 mail03 amavis[16885]: (16885-01) mail_via_smtp: session
> failed: No greeting, dt: 35.035 s

again: amavis can't forward the message.

> May 28 09:39:39 mail03 amavis[16885]: (16885-01) (!)FWD from <
> dan.344D07.26320A1 at mr4.mr.bmdeda99.com> -> <34140 at example.com>, 451 4.5.0
> From MTA() during fwd-connect (No greeting, dt: 35.035 s): id=16885-01
> May 28 09:39:39 mail03 amavis[16881]: (16881-01-2) ESMTP:[127.0.0.1]:10024
> /var/spool/amavisd/tmp/amavis-20140528T093857-16881-rUuP8hQe: <
> dan.344D07.26321F8 at mr4.mr.bmdeda99.com> -> <50085 at example.com> SIZE=15574
> Received: from mail03.example.com ([127.0.0.1]) by localhost (
> mail03.example.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP for <
> 50085 at example.com>; Wed, 28 May 2014 09:39:39 -0400 (EDT)

I suspect you send the message from amavis back into Postfix. If that is so,
why doesn't Postfix accept the message on reentry? You should take a look at
the log.

p at rick

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