spammer using cancel evading technique

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

Piotr KUCHARSKI <chopin at> 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             <>

More information about the inn-bugs mailing list