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Date:      Mon, 1 Oct 2001 21:43:04 -0400
From:      "Matthew Emmerton" <matt@gsicomp.on.ca>
To:        <freebsd-questions@freebsd.org>
Subject:   problems with sendmail and LONG delays
Message-ID:  <004601c14ae3$94bbc5d0$1200a8c0@gsicomp.on.ca>

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I have a 4.3-REL machine with sendmail 8.11.3 that has been acting up over
the past two weeks for no apparent reason.  This machine handles mail for
over 60 domains, and we're starting to get complaints from customers.

What is happening is that MUAs (Outlook, Netscape, Pine) connecting to
sendmail to send mail experience a 10-30 second delay before the message is
sent.  I've double- and triple-checked that all DNS related services are
working properly on this box.

As a test, I tried connecting to port 25 and 587 via localhost and by
external IP from the box itself.  In both of these tests, the sendmail
banner comes up immediately.  However, connecting from a remote box does
this:

gabby# telnet mydomain.com 25
Trying A.B.C.D...
telnet: connect to address A.B.C.D: Network dropped connection on reset
telnet: Unable to connect to remote host
gabby#

However, if I connect via the "submission port" (587), a connection comes up
immediately.

This explains why we're not seeing any delays in mail propagation, since the
MTAs (using port 587) are getting connected immediately.  However, sending
mail from MUAs (which use port 25) are seeing delays.

Does any one have any ideas on how to fix this?

--
Matt Emmerton


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