[Mimedefang] New spammer trick?

[Mark]

----- Original Message -----
From: "Joseph Brennan" <brennan at columbia.edu>
To: <mimedefang at lists.roaringpenguin.com>
Sent: Tuesday, November 25, 2003 5:06 PM
Subject: Re: [Mimedefang] New spammer trick?

> > I have not had any false positives yet. And why would I, even? There is
> > never ever a legitimate reason to pretend to be my server. So, anyone
> > who does, is banished for all eternity.
>
> Some PC clients say HELO followed by domain name. I don't know
> where this standards-non-compliant convention originated but it's
> been around for a while. It's probably to avoid having the PC
> look up its own hostname on dynamic lines. Hosts that do smtp
> service for PCs need to allow this, unless your only supported
> clients don't do it.

Clients whose IP is in the DRAC database, or who used SMTP AUTH, are exempt
from the check. The rest I cut down mercilessly. :)

- Mark