[Mailman-Users] filtering Importance headers

Is there a way that Mailman can remove certain headers before a message is
posted to a list? In particular, I want to remove the "Importance" header,
which some posters will set to "high" or "urgent" unnecessarily. Some MUAs
do all kinds of things users dislike for high-priority mails.

Note: I don't want to reject such posts automatically, b/c their content may
still be valuable, just not as urgent as the sender thinks.

Thanks,
Erez.

My guess is that the easiest way to do this would be using a simple Perl
script, and pipe incoming messages through this script before they hit
Mailman at all. You could also use Procmail / formail.

AFAIK, there's no way to do this within Mailman itself.