We're in the process of switching the mailing lists over to the new servers. The offsite backup mail server was supposed to pick up the slack while the DNS changes propagate, but apparently there've been some troubles with it. Sorry for any inconvenience; hopefully it'll all be working within a couple days at most for those having problems.
-- brion vibber (brion @ pobox.com)
wikitech-l@lists.wikimedia.org