I have an existing external mail server with the IP address 220.127.116.11 and the name mail.mywebsite.com, and an existing website hosting account that I want to transfer to Dreamhost (just the website, not the email).
Would I (within the DH admin):
- set up a custom MX record to point to mail.mywebsite.com
- set up a custom A record to point mail to 18.104.22.168
- set up a unique IP for mywebsite.com hosting account
- set the external mail server to receive mail from the unique IP
- transfer the DNS to DH
Does this sound right?