Thanks for the reply, that is not an issue. I should have said they get a
"outlook cannot contact you POP and SMTP servers"

If I change the POP and SMTP addresses TO ip addresses I get the same error.
I wondered if it was a DNS problem, but as I changed to IP addresses that
shouldn't be a problem..

Routing?

Tracert responds correctly. Maybe it's not an outlook issue.


I'm at a loss.