As of 15:20k PST, internal emails from '' are being refused by the mail server "address found in DNS Blacklist - Spamhaus_XBL" is a non-routable IP addy.....and searches of SpamCop/Spamhaus do not list that IP. Also, there is no way to contact them (is there ?) to get that generic IP released.

Other than manually assigning IP address, or stopping the there any way around this ?