I was surprised to find that Listserv apparently does not have a set of
content_filters set up, and the filter system appears to be fairly basic.

I'm in the process of converting some content filters from Majordomo to
Listserv, but does anyone have a set of suggested content filters they'd be
willing to share?

Here's what I'm starting with:

Subject: subscribe
Subject: unsubscribe
Subject: uns*b
Subject: un-sub
Subject: help
Subject: change*address
Subject: request*addition
Subject: cancel
Action: REJECT Subject contains 'cancel', 'subscribe', 'unsubscribe' or
other words that indicate an administrative message.