SPF

  Patrick Sande     Apr 24, 2021    

Sender Policy Framework (SPF) is another authentication tool to prevent spamming and spoofing. SPF allows senders to define which IP's are allowed to send email for a particular domain.

SPF Adoption Over Time

  1. Oct 2021: 92.7%
  2. Sept 2021: 96.43%
  3. Aug 2021: 98.15%
  4. July 2021: 97.74%
  5. June 2021: 96.12%
  6. May 2021: 98.13%
  7. Apr 2021: 96.67%
  8. Mar 2021: 95.52%
  9. Feb 2021: 95.93%
  10. Jan 2021: 97.05%
  11. Dec 2020: 95.89%
  12. Nov 2020: 93.07%
  13. Oct 2020: 0%
  14. Sep 2020: 0%
  15. Aug 2020: 0%
  16. Jul 2020: 0%
  17. Jun 2020: 0%