SPF

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. It works by publishing DNS records that list approved IP addresses, helping to prevent email spoofing and phishing attacks by enabling receiving mail servers to verify the sender's legitimacy.

Also known as: Sender Policy Framework, SPF alone, SPF record, SPF DNS record, SPF authentication

Why learn SPF?

Developers should learn SPF when working on email systems, security implementations, or domain management to combat spam and fraud. It's essential for ensuring email deliverability, complying with anti-spam regulations, and protecting organizational reputation by preventing unauthorized use of domains in email headers.

Learning Resources

• docs: SPF Record Syntax
• tutorial: SPF Overview - Cloudflare
• course: Email Authentication: SPF, DKIM, DMARC
• tool: SPF Record Generator