spammer using cancel evading technique

[Russ Allbery]

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/>