spammers harvesting emaill address from this list

[fbsd2]

> I get more PDF files lately and a T-O-N of the ASCII blue-
>pill ads...
>-----
>Eric F Crist
>Secure Computing Networks

-----Original Message-----
From: owner-freebsd-questions at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of Eric Crist
Sent: Thursday, August 23, 2007 9:19 PM
To: Pollywog
Cc: freebsd-questions at freebsd.org
Subject: Re: spammers harvesting email address from this list
How are those ASCII blue-pill ads email getting into the email server at my
ISP with those invalid headers?