There are a few reason why this could happen. I took a peek on Google (since I am still learning the ins-and-outs of *nix email systems) and it could be improper MX records, email address blocked, spam blocking, etc. Google: The error that the other server returned was: 554 5.7.1: Relay access denied
Not much help from me
But there are a lot of reasons for it and you will need to read through them and check your settings. The first one (Bob Cares?) seems to have several solutions.
Not much help from me
But there are a lot of reasons for it and you will need to read through them and check your settings. The first one (Bob Cares?) seems to have several solutions.