Mayday! Mayday!
We had relays.ordb.org listed as one of our blacklist servers. We were unaware that the service has been dead for about a year and a half. All of a sudden it listed everyone as being blacklisted. According to the internet that started around 3pm today. It was their way of ensuring that everyone stopped querying that service. All outside email to Dekko was rejected and were told they were on the blacklist at relays.ordb.org. Attempts to access that server were rejected with Page not found. Googling relays.ordb.org found the solution. I modified my Domino “Configuration” (not Server) document, Router/SMTP, Restrictions and Controls, SMTP Inbound Controls and removed relays.ordb.org from the list of blacklists. Bounced the servers and everything immediately started working.
See link below if you want more details.
http://www.nabble.com/relays.ordb.org-returning-positive-for-everything--td16286049.html
Boss is now saying, since we use Message Labs, why should we have any entries listed in our black list area?
I have it resolved by following the above. Just sharing with you all.