Hello all, two weeks ago we stopped receiving any email. Come to find
out it was because the domain had expired. Once we renewed it
everything was fine. Then a few days later email stopped again.

We checked the DNS records at the domain hosting company, and they had
been altered. We fixed them and all was fine. Then a few days later it
happened again. This time they had changed the MX record. We changed
it back, and all was fine.

Now all they get is spam, and most legitimate email is being blocked.
I tried some relay setting changes on the Barracuda spam blocker, but
nothing changes. Could the altering of an MX record have anything to
do with this?