[Wlug] Antispam software (was spam with header)

Karl Hiramoto karl@zoop.org
Tue, 2 Jul 2002 15:18:34 -0400 (EDT)

This would be an excellent meeting topic!

On Tue, 2 Jul 2002, Theo Van Dinter wrote:

> On Sun, Jun 30, 2002 at 10:38:24PM -0400, Karl Hiramoto wrote:
> > Do you have a project created for this software?  Distribute it?  I
> > have a spam problem @ work.  Looking into solutions.  I looked at maps
> > rbl http://mail-abuse.org/rbl/ not sure on using it in a production
> > environment though (where the most spam goes to)
> No, since it's mainly SpamAssassin with a little bit of procmail
> frosting and a small perl script on top.  I was planning to just make it
> all available with the perpetually unfinished article I'm working on.
> (It doesn't help that there were 2.5 new versions of SA released since
> I started writing it ... <grrrr>  ;) )
> > My main worry is someone sending e-mail to sales@company.com and it 
> > gettting rejected, and comany.com loses a sale.  Is this an issue?
> Well, that's the difference between a filter like SpamAssassin and
> a blacklist like the RBL.  Personally, I use several blacklists for
> open-relays at the SMTP level, since it's unusual to have a false-positive
> from an open-relay test (depending on the test of course).
> For a company, I would use a filter (like SA) and just let it mark up
> likely spam.  You can then leave it up to the users to decide what they
> want to do with it.  (SA adds headers indicating how likely a message
> is to be spam (the score/number of hits), and what tests matched a
> given message.)
> Anything else that makes it through to delivery goes through SpamAssassin.
> Spams gets sorted into a seperate mail folder, and I then go through it
> and report the spammers, etc.  There's some information about what I do
> for general filtering at:
> http://www.kluge.net/mailfiltering/


Karl Hiramoto    <karl@hiramoto.org>
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