[Mailman-Users] filtering posts to a list

[Marty Galyean]

Hi,
How would I insert an arbitrary perl filter for list posts?  I want to
filter out quoted instances of post footers in replies.  They really add
up when users don't trim and yet because the pattern is static it seem
onerous for the uses to have to trim the footer out of posts all the
time.

I'm imagining the equivalent of a .forward file with a pipe to a perl
script in it, that writes to the mbox file.

What is the sanest direction to take?

Thanks,
Marty