Re: How to reject spam with embedded graphics

On Tue, 2007-03-13 at 19:02 -0700, Paul Johnson wrote:
Michelle Konzack wrote in Article <20070313161632.GT2941@xxxxxxxxxx> posted
to gmane.linux.debian.user:

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)

Why do it this way when using spamassassin at SMTP time lets you reject the
spam regardless of content at SMTP time instead of using heuristics that
*will* come back to haunt you later?

It depends on whether or not that haunt bothers you.
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