SPF (Sender Policy Framework) is an email authentication protocol that allows domain owners to specify which mail servers are authorized to send email on behalf of their domain. SPF records are published as TXT records in DNS. When a receiving mail server gets an email, it checks the sender's domain SPF record to verify the sending server is authorized. SPF helps prevent email spoofing and improves email deliverability.
FAQ
What is SPF?
SPF is an email security protocol that tells receiving servers which mail servers are allowed to send email from your domain, helping prevent spoofing.