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Re: Spam in the lists out of control

On Tue, May 11, 2004 at 01:00:29AM +0200, Marek Habersack wrote:
> > > > How to filter such stuff?
> > > On the image URL and the GPG sig?
> > 
> > Well I was asking generaly. What if almost every future spam would
> > consist of some image and GPG signature?
> Each of those elements have some constant characteristic. In fact, having
> spam signed with GPG would make it easier to filter out - you could have
> your LDA check the signature, verify it and cast away should it fail
> verification. 

It's not so easy. In fact checking GPG signatures when fetchmail
downloads mails will kill my machine. 
Right now after night I have to download about 200 mails. Bayesian
filtering + procmail takes my machine about 10-15 minutes to sort out
this. With GPG signatures I will have to get up one hour earlier ;)
> > Filtering every such mail isn't a solution for me. 
> How come? You have to filter every mail in order to see whether it's spam or
> not anyway... 

Yes but there are less or more complicated filtering solutions. 
Sure I can write very complicated rules for procmail + bogofilter
+ spamassasin + gnupg checks + <put whatever you want>, but hey... every
check needs CPU power and harddrive access.

> There is a tool that does a very good job for keeping spam
> away from your box if you're willing to put some effort in configuring it
> (I'm not using it personally, but my boss is - with a great success) -
> http://www.tmda.net/

That looks interesting. Thanks for pointing it out to me.
> > In fact mails with GPG signatures had some possitive score in my
> > procmail. Now I have to remove it :/
> I don't think it is a good idea anyway, it's like leaving a passage for
> possible spam.

Yes... but this worked perfectly so far... Mail mentioned by me was the
*first* GPG signed spam I ever seen ;)

      _      Bartosz Fenski | mailto:fenio@o2.pl | pgp:0x13fefc40 | IRC:fEnIo
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    (0 0)          phone:+48602383548 | Slackware - the weakest link
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