From: Andrew McNamara (andrewmobject-craft.com.au)
Date: Tue Mar 04 2003 - 18:32:32 CST

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>The problem is that spammers nowadays are forging/faking not only sender
>addresses, but everything else, including fake X-Mailer headers. Take
>a look at your spam with The Bat! MUA: if it also contains X-MimeOle:
>or X-MSMail-Priority: headers, 99% chances that this is NOT the bat
>in the first place. The Bat NEVER uses such headers. Spammers are
>just faking most commonly used MUAs - and from this point of view,
>The Bat is very popular, much like M$ Outlook...

That suggests a useful technique for spam filtering - combinations of
headers that are not produced by a given MTA.

--
Andrew McNamara, Senior Developer, Object Craft
http://www.object-craft.com.au/

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