Ok, simple question (hopefully)
If I want to host multiple email domains on one mail server, can I use the MX record for one domain to point to a host on another domain?
in maildomain1.com the MX record = server.maildomain1.com
the A record for the server = IP
in maildomain2.com the MX record = server.maildomain1.com
in the maildomain2.com there are no host records, because technically there are not any servers. The server that it is hosted on is in maildomain1.com.
Is this valid? If it is confusing, I appologize. I can post zone configs if needed.