On Mon, 06 Oct 2014 21:28:02 +0200
Karsten Bräckelmann <guent...@rudersport.de> wrote:

> Unless the message's MIME-structure is severely broken, these tokens
> appear somewhere other than a base64 encoded attachment.

Agreed, and a Qmail bounce message is a prime example of a message
whose MIME structure is "severely broken".  I wonder if that's what
the OP is seeing?

Qmail's bounce message starts with:

"Hi. This is the"

and then (sometimes) includes the entire raw MIME message as a giant
glob of text.

http://cr.yp.to/proto/qsbmf.txt

We have custom code specifically to detect such messages and avoid
tokenizing them. :(

Regards,

David.

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