On Mon, Sep 14, 2015 at 10:20:49PM +0200, Pavel Dimow wrote:
> Sep 13 13:35:35 imap postfix/lmtp[8943]: 75076AB380: to=<+
> t...@testdomain.com>, relay=test.testdomain.com[/var/lib/imap/socket/lmtp],
> delay=3.6, delays=2.6/0.36/0/0.65, dsn=4.3.0, status=deferred (host
> test.testdomain.com[/var/lib/imap/socket/lmtp] said: 451 4.3.0 System I/O
> error (in reply to end of DATA command)
>
> We use postfix to deliver mail via LMTP to cyrus. I would like to future
> troubleshoot this issue and I don't know if the problem is in postfix or
> cyrus. Any thoughts?
Look in the Cyrus LMTP server logs. Postfix is just the messenger.
--
Viktor.
