I need to do the same and want to make sure I have impletmented this correctly.
In my case, I am hosting the web site under plesk and the DNS. The mail is being sent to a remote mail server. DNS is setup for that.
Here is my DNS record:
polknc.org. NS ns1.synergydns.net.
ns.polknc.org. A 207.97.214.168
polknc.org. A 207.97.214.168
webmail.polknc.org. A 207.97.214.168
mail.polknc.org. A 216.105.135.226
backupmail.polknc.org. A 207.97.214.168
ftp.polknc.org. CNAME polknc.org.
lists.polknc.org. CNAME polknc.org.
www.polknc.org. CNAME polknc.org.
polknc.org. MX (50) backupmail.polknc.org.
polknc.org. MX (10) mail.polknc.org.
207.97.214.168 / 24 PTR polknc.org.
Currently the domain polknc.org is in my rcpthosts and virtualdomains files in /var/qmail/control directory.
Should I remove the domain from those files?
Here is my morercpthosts file:
polknc.org
Here is my smtproutes file:
polknc.org: 216.105.135.226
Is this the correct setup?
Thanks