These forums are locked and archived, but all topics have been migrated to the new forum. You can search for this topic on the new forum: Search for (reason: 550 5.1.1: Recipient address rejected: User unknown in local recipient table) on the new forum.
Howdy,
Are you saying this particular address sometimes works, and sometimes doesn't?
Or does this particular address fail all the time?
-Eric
It sometimes work and other times not.