Yes, - apologies Peter,
Saying '$WAGLOBAL_Email_Server = "" ;' wasn't a very useful way of helping.
Removing the Server Name and Port Number from the UE interface is what I should have said, and I see you have tried that.
If you have done that, and uploaded your pages and whole WA_Universal_Email folder to your server, sent a test mail, checked your email forwarding and the spam filtering and STILL not received the email, then only your hosts can really provide the correct details!
If my host was unable to provide this information, I would switch providers. Maybe when the WA Guys return on Monday, they may have something further to suggest.
Sorry to have confused.