What is SPF?
Sender Policy Framework (SPF) is an industry standard record used to prevent domain spoofing and spam by verifying the source for e-mail messages. It is a method of informing servers whether a specific mail server is authorized to send an email for a particular domain. Recipients can refer to the SPF record to determine whether a message claiming to be from your domain comes from an authorized mail server. An SPF record increases the likelihood that emails sent by valid addresses are delivered.
How To Add and SPF Record
If you are having issues adding your SPF or DKIM record, here are some helpful troubleshooting articles: