How do I add an SPF record for my domain?
You can add a SPF record as a TXT record for your domain. This would be done within DNS Manager or where you are hosting your DNS records at. An example of the record would be the following:
your_domain_name.com TXT "v=spf1 a ~all"
You'll update each file with the information that's needed for your domain. You can also reference our guides for additional isight regarding records of this sort.