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Subject: Re: Postfix sends FIN too early?
From: Wietse Venema (wietseporcupine.org)
Date: Wed Sep 20 2000 - 08:19:07 CDT

Jan Chrillesen:
> Customers are complaining about our mailserver sending RST's at the end of
> the SMTP dialogue. tcpdump reveals that they're right.

Indeed. The Postfix SMTP client sends QUIT and closes the connection,
because the response does not serve a useful purpose. What if the
remote server disagrees with the QUIT command? All we can do is
disconnect. What if the server reply never makes it across the
network? We're just wasting time.).

To disable,

    /etc/postfix/main.cf:
        smtp_skip_quit_response = no

I wonder what software is griping about not being able to reply to
QUIT. I had to stop Postfix from complaining because some clients
do not even send QUIT, they just break the connection.

        Wietse