SPF (Sender Policy Framework)

SPF works by allowing domain owners to publish a list of authorized mail servers in their DNS records. When an email is received, the recipient’s mail server checks the SPF record to confirm that the email originated from an authorized server. If the check fails, the email may be marked as suspicious or rejected.

Implementing SPF helps improve email deliverability and protect against phishing attacks by ensuring that only legitimate sources can send emails on behalf of a domain. Proper configuration of SPF records is crucial for maintaining email security and reputation.