[Mailman-Users] Trapping posts with no subject

[Mike Maughan]

Hi guys,

I am aggravated by a few idle list posters who consistently refuse to put in
a subject in their posts, and I would like to 'encourage' them to mend their
ways :)

I've tried putting a spam rule as per the faq, trapping subject containing
.*(no subject) but no workie.

The cases I'd like to trap are:

   1. empty subject
   2. (no subject)
   3. (no_subject)

Is there an easy way?  Am I (as has been known on occasion :) missing
something obvious?

-- 
Regards, Mike