CNAME Records
Step 1: Go to register.com Log in to your register.com account and go to Manage Account.
Step 2: Hover your cursor over Domains and select Manage.
Step 3: Click Manage under the domain you want to send the automated emails from.
Step 4: Scroll down and click on Edit Domain Aliases Records next to CNAME.
5. Enter the details for your CNAME records. Copy the CNAME record value shared by datahash and paste the same in the domain manager
Step 6: Save the changes.