"startup" of smtp connection timeout

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#3596

From: Jeremy Fitz
Date: Wed, 12 Feb 2003 03:42

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Hi:

I have a microsoft (win2k) box running ISA server (firewall).  When I telnet
from this box to a specific unix-based sendmail box (port 25), the unix box
shows the connection sitting in startup phase... until I kill the telnet
session.  This only happens with a minority of mail servers - for the most
part my telnet session usually connects immediately, and I have no problems
sending mail.  NB. I am using telnet for troubleshooting to replace the SMTP
(exchange server) that is having problems sending mail.

Under UNIX,  ps -elf   shows something like
sendmail: startup with aa.bb.cc.dd

In order to debug this problem, I'd like to understand what sendmail is
doing during "startup".  Can anyone point me to information on this topic -
or more importantly what can cause the "startup" phase to hang like this. I
am sure this has something to do with the particulars of the microsoft box
(DNS? - not the unix box) as other hosts have no problems connecting to the
unix box in question.

Thoughts?
Thanks

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From: "Jeremy Fitz" <jeremyfitz@hotmail.com>
Newsgroups: comp.mail.sendmail,cz.comp.mail.sendmail,microsoft.public.exchange.connectivity,microsoft.public.isa.configuration
Subject: "startup" of smtp connection timeout
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