We have seen similar problems, when using certain blacklists.
Broken Blacklists take ages to respond and the client times out.
Also mail coming from Services like netfront might timeout , in our case we
added those ips to our relay list (dangerous if not done with trusted
source: NEVER do it with dynamic IPs)
HTH
Rodrigo O
xnet
-----Original Message-----
From: Dogsbody [mailto:dan (at mark) dogsbody.org]
Sent: Martes, 27 de Mayo de 2008 08:36 a.m.
To: coba-e (at mark) bluequartz.org
Subject: [coba-e:13091] Re: did not issue MAIL/EXPN/VRFY/ETRN during
connection to MTA
>>> We are getting this error on just one site.
>>> Maybe we should delete the site and recreate???
>>>
>>> did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
It shouts of being a connection issue. The remote mail server connects on a
TCP/IP level but then never issues any commands to try and send the mail to
the server and then disconnects (or times out).
You could check any firewalls between the two servers. As this is only
happening for one site I would suggest the problem is with the remote site
more than the server itself.
Is it mail coming from one location to the server or multiple places?
Perhaps an anti-spam measure? Have you changed any of the sendmail settings
such as "greet_pause"?
Dan