http://mail.wikipedia.org/mailman/listinfo/wikien-l
I've rewritten the text a bit (tighten it up, emphasise certain details, etc). The 'how to post' bit now specifically addresses blocked users. The following para warns of what happens to uncivil emails. The 'rules' bit at the end is written as a general expectation.
The really annoying people don't read anyway, but at least this should set expectations appropriately :-)
- d.