[Mailman-Users] Filtering on subject prefix

[Gordon Moyer]

I am running mailman 2.1.9 and I'd like to auto discard list emails
with a subject prefix of "***SPAM***" (this is being done by
spamasassin).  I've been looking for rule documentation, and haven't
been able to find any.

Can anyone tell me what the rule would look like that would filter on
this subject prefix?  ...Or maybe someone can point me toward any rule
documentation that exists.

Thanks for any help.

Gordon
Portland, Oregon USA