Hm. When looking over my attachments, none of the mail headers had 
Content-Transfer-Encoding as a header. It's really a question of that specific header 
in use rather than attachments in general.


> Most every attachment nowadays is encoded like that.  For example, an html email 
>from Outlook Express will have images
> contained in the mail like that.
> 
> Howie
> 
> ----- Original Message -----
> From: "Michael Dinowitz" <[EMAIL PROTECTED]>
> To: "inFusion Support List" <[EMAIL PROTECTED]>
> Sent: Thursday, September 12, 2002 1:40 PM
> Subject: [iMS] Base 64 mail
> 
> 
> I'm thinking of adding a new filter to my spam engine based on 
>Content-Transfer-Encoding of base64. Has anyone gotten
> anything legitimate using this encoding type? Is it common in Europe or Asia for 
>normal mail? I know a number of
> spammers use it to 'hide' their content from content scanners.
> Thanks
> 
> Michael Dinowitz
> Master of the House of Fusion
> http://www.houseoffusion.com
> 
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