For some lovely reason our new mail server has been blacklisted by SpamCop, allegedly for sending mail to spamtrap addresses. (They provide no details by policy, of course, so there's no way to verify it.)
Since there's a tiny possibility that the user-to-user email feature actually could be abused, I've gone ahead and enabled the e-mail confirmation requirement for using email features. This is a bit annoying for the moment since you have to do it separately on each wiki.
I've disputed the listing, so hopefully we'll get it removed soonish and those who aren't getting email will, uh, start getting it again.
-- brion vibber (brion @ pobox.com)