Mailing lists' controller addresses not working
This probably isn't the right place to report this, but I do not know a better one...
Mail delivery failed: returning message to sender SMTP error from remote server after RCPT command: host: neon.ruby-lang.org 5.1.1 <email@example.com>: Recipient address rejected: User unknown in local recipient table
That means it's not possible to subscribe/unsubscribe right now.
I already count about 450 failed subscribe/unsubscribe requests through the subscription form on www.ruby-lang.org.
This started on 2013/08/06.