On Tue, Apr 23, 2013 at 10:52:02PM +0200, Michael Storz wrote:
> >After sending END-OF-MESSAGE, the Postfix smtpd_proxy_CLIENT closes
> >the SMTP connection to the before-queue content filter.
>
> And this is exactly the problem: smtpd_proxy_CLIENT closes the
> connection without sending
> the QUIT command first, which is in violation of RFC 5321, section
> "4.1.1.10. QUIT (QUIT)"
This is irrelevant. All TCP services need to handle mid-stream
client disconnect sensibly. QUIT is nice to send, but this is not
always possible, so deviating from RFC 5321 by not sending QUIT
is harmless.
> >Apparently the content filter is waiting for QUIT *after* the
> >connection is closed. Please file a bug report for the content
> >filter.
>
> Wietse, this was a bug report for Postfix! Filing a bug report for
> the content filter because it does not check for a dropped
> connection is another story.
And yet that's the real problem, the content filter must propagate
not only QUIT but also EOF.
--
Viktor.
