Email Undeliverable


I’ve just set up my DH email. I have 2 email addresses, and they both forward to my main (unrelated) Gmail address. When I test email it from my work email, I get an Email Undeliverable message, but the message is being received into my gmail account.
Any ideas why I would get an ‘undeliverable’ message when I’m actually receiving the message, and how I can get it to stop?

I also can’t get to my ‘mailbox manager’ in my control panel.[hr]
nevermind. looks like it was their issue, not mine