What is SPF?

An SPF (Sender Policy Framework) record is a type of DNS record used to prevent email spoofing. Spoofing is when someone sends an email pretending to be someone else, such as a well-known company or organization. SPF records help protect against this by verifying that incoming email messages are coming from an authorized mail server for a particular domain.

When an email server receives a message, it checks the SPF record for the domain in the message's "envelope from" address. If the message is coming from an authorized mail server, it is accepted. If it is coming from an unauthorized server, it is typically rejected or marked as spam. By implementing an SPF record, domain owners can increase the likelihood that their emails will be delivered successfully and reduce the risk of their domain being used for phishing or spamming purposes.