Okay, mailing lists should be back up -- they were down due to a thinko in the firewall configuration (run on bootup) that a) didn't let it look up the IP addresses of other mail servers and b) wouldn't let it connect to them and send out mail anyway.
Fixed now. Backed-up messages should still be delivered.
-- brion vibber (brion @ pobox.com)
wikipedia-l@lists.wikimedia.org