[CentOS] Probelm with some smtp MTAs

Fri Feb 16 18:32:49 UTC 2007
James B. Byrne <byrnejb at harte-lyne.ca>

I am getting large numbers of these types of messages in my maillog files:

somehost.hotmail.com [65.54.246.97] did not issue MAIL/EXPN/VRFY/ETRN
during connection to MTA

on both of our external machines beginning on the same date.  These hosts
sit on different netblocks and on both machines the sendmail.cf files date
from  Jan 09, 2007.

The last successfull connection from any hotmail acocunt was on Jan 15 at
13:17:29.  The first failure was recorded on Jan 15 at 18:36:46.
Does anybody have any idea what is going on?  We are now getting reports
that hotmail users are getting a delayed transmission warning and then a
failure message.  Is this a sender's issue or our local configuration
issue?

ANY help regarding this matter would be most appreciated. If you feel that
sendmail related items should not be discussed on the list then please
contact me privately.

Thanks,
Jim

-- 
James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
9 Brockley Drive              vox: +1 905 561 1241
Hamilton, Ontario             fax: +1 905 561 0757
Canada  L8E 3C3