SPF

Sender Policy Framework

📡 Sender Policy Framework (SPF)

Sender Policy Framework (SPF) is an email authentication standard designed to prevent domain spoofing by verifying which mail servers are authorised to send emails for your domain.

It was introduced to fix a core flaw in SMTP — the protocol never verified the identity of the sender. SPF allows domain owners to publish a DNS record that specifies approved sending hosts, helping receiving mail servers identify forged messages.