We have seen the same thing.
Dirk
On Tue, Dec 29, 1998 at 09:28:47AM +1100, brett wrote:
>
> 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 -----
>
>
