ORDB.org blacklisting all IP addresses April 2nd, 2008
Urgent FYI:
Apparently the old and crufty realtime blacklist server relay.ordb.org that was retired in 2006 has the entire world blacklisted. Any mailserver still using this rbl is now effectively blocking ALL email traffic. Remove it from your configurations ASAP.
See http://groups.google.com/group/news.admin.net-abuse.email/browse_thread/thread/c45f42a8621c60fc/8fb6e83837759ffe and http://www.dnsbl.com/2007/02/status-of-relaysordborg-dead.html for more info.
