Sender Policy Framework

lastmod 2025-03-26created 2020-04-014 edits

Sender Policy Framework (SPF) is an email authentication method designed to detect forging sender addresses during the delivery of the email. SPF alone, though, is limited only to detect a forged sender claimed in the envelope of the email which is used when the mail gets bounced. Only in combination with DMARC can it be used to detect the forging of the visible sender in emails (email spoofing), a technique often used in phishing and email spam.

See also

• Email
• SMTP
• SPF
• DKIM
• DMARC

Favorite site

• Wikipedia (en) Sender Policy Framework
• What are SPF and DKIM?
• Introducing email security enhancement features (SPF) : TOAST Meetup
• Spammers make better use of SPF, DKIM, and DMARC | GeekNews
• Understanding SPF, DKIM, and DMARC: A simple guide | GeekNews
  • [Original] Github - nicanorflavier/spf-dkim-dmarc-simplified - Understanding SPF, DKIM, and DMARC: A Simple Guide
• See interactively how email SPF/DKIM/DMARC work | GeekNews
  • [Original] Learn and Test DMARC