Re: This mail list and its policies

Tom Lane wrote:
> nolan@celery.tssi.com writes:
> > Also, I DO run spamassassin here, and it is finding only perhaps 10-20%
> > of the copies of the most recent worm.  I think it sends out copies that
> > are sufficiently different from each other that it bypasses all the
> > checks, including a Bayesian filter.
>
> Hmm.  I've had no trouble filtering the actual worm (I filter using a
> pattern that looks for the first few bytes of a base64-encoded Windows
> executable file).  The only copies that were getting as far as my spam
> inbox were ones that had had the executable file removed by various
> "helpful" filtering programs.

Rather than configuring my filter for every virus, I just block evil
attachments via procmail:

    * ^(Content-Type: [^;]*;|       )? *(file)?name="?[^"]*\.(exe|com|pif|scr|bat)"?$

One interesting modification I have is that once I recieve a virus
email, I block further emails from that host.  Yea, it could block later
valid email, but preventing all those viruses from being downloaded
before being checked is worth it.

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  Bruce Momjian                        |  http://candle.pha.pa.us
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