Just seen in a mailserver logfile:
(host mail.********.com[xxx.xxx.xxx.xxx] said: 451 ordb.org was shut down on December 18, 2006. Please remove from your mailserver. (in reply to RCPT TO command))
I'm not sure, but maybe some ppl using this mailserver should recognize that they don't get any emails at all.
Welcome side effect: they also don't get any spam mails.