spammer using cancel evading technique

Russ Allbery rra at stanford.edu
Wed Dec 3 02:18:03 UTC 2003


Piotr KUCHARSKI <chopin at sgh.waw.pl> writes:

> Tomasz Surmacz suggested that perhaps innd could take care of this
> problem, checking whether a post with "Message-ID: <cancel.X>" also
> contains "Control: cancel X" and accept it, if so, as this generates two
> entries in a history (for X and cancel.X) and eliminates this problem.

Yup, you can definitely do that in a local Perl or Python filter and it's
not a bad idea for inclusion in something like Cleanfeed.

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>


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