Create an SPF record
Log in to the control panel for your domain DNS host.
Create a TXT record with the following specifications.
Type Hostname Destination TTL TXT @ v=spf1 include:emailsrvr.com ~all 3600
Decide how you want to enforce SPF failures.
~allwill result in a soft fail (Not authorized, but not explicitly unauthorized).
-allwill result in a hard fail (Unauthorized).
?allis neutral (As if there is no policy at all).
Enter your choice after v=spf1 include:emailsrvr.com, and then save your changes.
Authorize additional mail servers by adding their IP or server name after include:.
- For example:
Type Hostname Destination TTL TXT @ v=spf1 include:emailsrvr.com include:othermailer.com ~all 3600
Save your changes.