Okay - I have emails going to watch lists, bulk email, new users etc., however with one problem - the only person(s) to get any emails are those with accounts on the server.
For example I tried sending a bulk email out to users including Rick & Gizmo amongst others and I do not believe any of them got outside the server - whereas all my accounts on the server, got the emails fine.
All very strange.....
I will have to dig deeper....