Just added another MX record to reflect our new domain name and was
getting the following bounce back;

553 Requested action not taken: mailbox name not allowed or chunk too large

I then remembered that the Firebox was using a smtp proxy. I added the
new domain name to the proxy and now I get the following bounce back;

554 Transaction failed

I have to missing something in my Watchguard config, but what? Anyone
have a clue they'd like to offer me?

Ted Novak