MX record

I created a virtual server in Virtualmin and there is an MX record in BIND. But when I check in https://intodns.com/ it reports “Oh well, I did not detect any MX records so you probably don’t have any and if you know you should have then they may be missing at your nameservers!”

What do I need to do?

Make sure your glue records at the registrar actually point to your DNS server(s).

The glue records are correct and I have no problem with any of the other records located on the DNS server.