DNS Setup for Linode
Log in to your Linode account. Go to the DNS Manager and click the Edit link under the Options for your appropriate domain.
To create a CNAME record, click the Add a new CNAME record under the CNAME Records section.
Enter the Hostname we recommend into the Hostname field. You can find this on the "Settings > Verified Senders" page in your SMTP2GO Dashboard.
Enter the Value that we advise for your CNAME record into the Aliases to field, then click the Save Changes button.
Repeat steps 2 and 3 for each required CNAME record.