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What is SPF (Sender Policy Framework)?

What is SPF and why it is so important today?

🔎 What is SPF?

SPF is an email authentication mechanism published in the DNS records of a sending domain.

It shows a list (called SPF record) of authorized IPs that can use this domain to send emails. As this list is public, the receiving server will be able to compare it with the IP of the incoming email.

It allows:

  • The receiver to verify the authenticity of the sender, to avoid any spam, spoofing or phishing.
  • The sender to protect his domain from third-party malicious and unauthorized activities that could affect its trustworthiness.

💡 Why it is so important?

SPF, just like DMARC and DKIM, is a security layer to ensure email safety.

As for any email security protocols, having an SPF properly set improves the deliverability of emails sent from this domain.

📹 Video explanation

Don't let your cold email land in spam