AltDB bouncing emails

I've been trying to get some super old entries removed from altdb, however the db-admin email bounces: The mail system <db-admin@altdb.net>: host pobox.rubinbroadcasting.com[65.50.205.32] said: 550     5.7.1 Unable to relay (in reply to RCPT TO command) Is there another contact here? Also, if anyone from Internap/Voxel.net is around... I've been trying to find someone with a clue to remove some IRR entries, ref ticket 3190091