VERP - Variable Envelope Return Path

[Matthias Andree]

David Relson <relson at osagesoftware.com> writes:

> Greetings,
>
> Yesterday I discovered my wordlist has a large number of singleton
> tokens of the form "bogofilter-return-586-relson" and learned that
> they're called VERPs.  After a google search, and some reading, I'm now
> an expert --- Not!!!
>
> As an experiment I added the following lines to bogofilter's lexer:
>
> 	VERP		{TOKEN}-[0-9]+-{TOKEN}={TOKEN}@{TOKEN}
> 	<INITIAL>{VERP} { skip_to('='); return VERP; }
>
> With a little bit of additional code, the following header lines:
>
> 	From bogofilter-return-586-relson=example.com at aotto.com  Fri Nov
> 	1 07:42:39 2002

Well, the relson=example.com part is YOUR address, so it's invariant for
that list; the changing part is the message ID, 586 in this case.

I'd probably go for [0-9a-fA-Z] or even the whole alphanumerical range.

> could yield token "verp:bogofilter-return-X-relson" (as well as other
> tokens).  This would change the non-recurring single use tokens into a
> repeated, recognized token that contributes to the spam/ham score.

> Anybody have a better idea, alternate approach, or reasons for/against
> making this change?

Go for it.

-- 
Matthias Andree

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