I would like to use my own outbound email server
Haraka with Node.js and Google Apps for inbound mail.
Now my domain registrar gives one click Google Apps setup, however I've already set up my own outbound server and it says:
Caution: The main domain name (www.)mydomain.com is using MX : mail.mydomain.com already. If you want to add Google Apps, you need create a subdomain, e.g. xyz.mydomain.com or remove MX : mail.mydomain.com.
So how can I implement both correctly with
DKIM records without any interference?
P.S. I'm very new at this topic, sorry if my question feels a bit confusing