Point 2nd domain name to existing site whilst retaining email accounts

Question

I tried searching on SO but all answers seem to involve .htaccess and 301 redirects. I am wondering if there is a way to do this just using cpanel and the DNS providers interface.

Simply I own two domain names: mysite.com and thissite.com

Both are currently pointing to servers and both have email addresses associated with them.

I want to point thissite.com to mysite.com without disrupting the email addresses already associated with thissite.com

At first I changed the nameservers of thissite.com to be the same as mysite.com but this disrupted the emails so I quickly changed them back.

I then changed the A record of thissite.com to point to the IP address of mysite.com. The same issue seems to have occurred though - the email addresses are still broken.

Can anyone point me in the right direction here? Thanks

Answer 1

Normally A records are not related to emails. Possibly your email problems caused by DNS still cached since your first experiment.

DNS stores a destination SMTP server where email for the domain in an MX-type record. See what MX record you have for thissite.com.

nslookup
set type=mx
thissite.com

If your domain have correct MX records, then the A record do not matter for emails.