[lug] Sendmail 8.12.2 & outgoing spam

[Riggs, Rob]

One must be careful with received headers as well. It is becoming more
common that spam I receive lately contain a forged received line or two.


-----Original Message-----
From: Sean Reifschneider [mailto:jafo-nclug at tummy.com]
Sent: Tuesday, January 15, 2002 1:53 PM
To: lug at lug.boulder.co.us
Subject: Re: [lug] Sendmail 8.12.2 & outgoing spam


On Tue, Jan 15, 2002 at 01:31:36PM -0700, D. Stimits wrote:
>FYI, it's fairly common for me to turn in a spammer, and have it turn
>out they forged the header.

That's because most spammers will forge the from header so they don't have
to deal with the tens of thousands of bounced messages.  The only reliable
tracking is the Received line that tells you what machine connected to
yours.  Also, if they list a URL in the mail, you can report that to the
ISP that controls it -- they often will shut down the server.