[Mailman-Users] Administrivia boilerplate

[Kenneth Porter]

Does anyone have some good boilerplate to use in a welcome message or a 
periodic reminder to cover some of the common newbie mistakes?

I'm thinking of issues like hijacking threads, which a lot of new list 
users don't understand, and use of the List-Id header for filtering. (Esp. 
for Outlook Express, users of which rarely see headers.)