A For Your Information re-post :)
Brett Morgan
----- Forwarded message from Nelson Bunker <[EMAIL PROTECTED]> -----
X-Mailer: Internet Mail Service (5.5.2232.9)
Date: Mon, 28 Dec 1998 10:40:41 -0600
From: Nelson Bunker <[EMAIL PROTECTED]>
Subject: IIS 4.0 SMTPSVC vs. QMAIL
To: [EMAIL PROTECTED]
To whom it may concern--
Our establishment has started to use IIS4.0 option pack SMTP service
(post SP4) for our outgoing mail. We have had several complaints regarding
an issue with trying to send mail destined for servers running "Qmail". It
appears that the Qmail shuts down the connection with out giving an error
message. In return the IIS Server acts as if nothing happened and tries to
re-open the connection. I have had report of
{On Dec. 10 1998, we received approximately 30,000 connections from {this
address on port 25 from our mail server from midnight until {around 13:30.
another admin reports 4400 SMTP requests within 10 minutes
I would appear that Microsoft has given away a great DOS attack for QMail...
has anyone else experienced this problem? SP4 fixed many errors we were
experiencing with SMTP, but it apparently didn't fix this one.... so far the
only fix we know of is to delete the offending piece of mail.
Nelson Bunker
----- End forwarded message -----
