Re: Blacklisting and Tar-pitting

[Patrick P Murphy <pmurphy () NRAO EDU>]

On Wed, 6 Aug 2008 09:08:38 -0400, "Jason C.Belford"
   <jason.belford () OIT GATECH EDU> said:

> At one time we would simply tag the message with a spam score and
> allow our users to create a filter.  However, if our user was
> forwarding incoming mail to an off-campus address, the spam would
> forward before any filters could be applied (if filters were even
> created).

If you're using a *nix based server for this, there is a solution to
this dilemma.  Instead of a simple mail alias, if you set the forward to
be:

   joeuser: "| procmail DEST=joeuser () another example edu"

and write a global /etc/procmailrc that (a) does the institutional spam
quarantining first and (b) picks up the value of $DEST and does the
forwarding via formail.  I can send specifics of what we use if that
will help.

 - Pat

--
 Patrick P. Murphy, Ph.D.   Webmaster (East), Computing Security Manager
 http://www.nrao.edu/~pmurphy/          http://chien-noir.com/maze.shtml
 "Inventions then cannot, in nature, be a subject of property."
                                    -- Thomas Jefferson, August 13, 1813