This works quite well with procmail 3.10 (in use here at goodnet.com).
Notice that I was very carefull in how I formed the subject line in my
reply. It could have deleted your original message.
:0
* ^Subject:.*\$\$\$
/dev/null
================================================================
Date: Wed, 25 Mar 1998 20:20:58 -0500 (EST)
From: gsutter(_at_)pobox(_dot_)com
To: procmail(_at_)informatik(_dot_)rwth-aachen(_dot_)de
Subject: Re: --------------Earn Easy Extra $$$$---------------
Message-ID:
<Pine(_dot_)BSF(_dot_)3(_dot_)96(_dot_)980325201828(_dot_)27151w-100000(_at_)mph124b(_dot_)rh(_dot_)psu(_dot_)edu>
Content-Type: TEXT/PLAIN; charset=US-ASCII
This spam was caught by junkfilter with the following recipe:
----
Felix Tilley
ftilley(_at_)goodnet(_dot_)com
Tucson, Arizona