Am 2007-03-07 11:19:30, schrieb Chris Lale:
> There was some discussion on the list a while ago about how to deal with
> spam that has text as graphics embedded in it. There was disagreement
> about whether or not to use it to teach SpamAssassin. I have continued
> feeding this spam to SpamAssassin, but a large amount still gets through.
>
> Does anyone know of a way to deal with spam with embedded graphics? I
> cannot use greylisting on a home desktop machine.
>
> Any thoughts welcome.
On SMTP level?
You can test the incoming HEADER if it contain
Content-Type:.*image/(gif|jpeg|pjpeg|png)
which mean it is a IMAGE spam only (I get per day arround
150 of them) and reject it.
Then a second filter which check the HEADER for
Content-Type:.*multipart/mixed
AND the BODY
Content-Type:.*image/(gif|jpeg|pjpeg|png)
from which I get per day arround 3800.
Please note, that if you have friends you should put them
by default into a WHITELIST to solve future problems.
Greetings and nice Day
Michelle Konzack
Systemadministrator
Tamay Dogan Network
Debian GNU/Linux Consultant
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