Interesting spam test

[dhml at comcast.net (David Hummel)]

On Thu, Mar 31, 2005 at 01:26:13AM -0500, David Kramer wrote:
> 
> I came up with my own technique, which works well, but has only one minor 
> (to me) problem with it.
> 
> Postfix feeds mail to Mailman via the aliases table like so:
> 
> mailman:             "|/usr/lib/mailman/mail/mailman post mailman"
> ....
> 
> So first I put spamc in the pipe:
> mailman:             "|/usr/bin/spamc |/usr/lib/mailman/mail/mailman post 
> mailman"
> 
> Now spamassassin will put in the X-Spam... headers.
> 
> Next, newer versions of Mailman let you trap spam by looking for regular 
> expressions.  You can either look for the "X-Spam-Status: Yes" (if you want 
> to control the trip point with spamassassin), or look for the 
> "X-Spam-Level: \*\*\*\*\*" (if you want to control the trup point with 
> Mailman)
> 
> I testted this all out, and there's only one problem.  If the message is 
> reported as spam, spamassassin will wrap the message in mime and put the 
> "Spam detection software, running on the system..." message in front of it. 
>    If you decide that it was NOT spam, then you would have to copy/paste 
> the original mail into a new mail and you lose the sender.
> 
> Can you think of a way around this problem?

What happens if you filter through spamassassin rather than spamc?:

mailman: "|/usr/bin/spamassassin -P |/usr/lib/mailman/mail/mailman post mailman" 
....

-David