SPF.Guru

SPF checker

Evaluate a domain's SPF record the way a receiving mail server does. Every mechanism, DNS lookup and macro expansion is shown, so you can see not just the verdict but where it came from.

A bare domain works too

IPv4 or IPv6

Defaults to the sender domain

Evaluated instead of the published record, so you can test one before publishing it. Includes inside it still resolve live.

softfail

The sending IP is not authorised, but the domain asks for a soft landing.

DNS terms used
1 of 10
Void lookups
0 of 2
DNS queries
2
Elapsed
36 ms

How it was evaluated

  1. record for sendgrid.net v=spf1 ip4:167.89.0.0/17 ip4:208.117.48.0/20 ip4:50.31.32.0/19 ip4:198.37.144.0/20 ip4:198.21.0.0/21 ip4:192.254.112.0/20 ip4:168.245.0.0/17 ip4:149.72.0.0/16 ip4:159.183.0.0/16 ip4:134.128.64.0/19 ip4:134.128.96.0/19 include:ab.sendgrid.net ~all
  2. ip4:167.89.0.0/17 no match
  3. ip4:208.117.48.0/20 no match
  4. ip4:50.31.32.0/19 no match
  5. ip4:198.37.144.0/20 no match
  6. ip4:198.21.0.0/21 no match
  7. ip4:192.254.112.0/20 no match
  8. ip4:168.245.0.0/17 no match
  9. ip4:149.72.0.0/16 no match
  10. ip4:159.183.0.0/16 no match
  11. ip4:134.128.64.0/19 no match
  12. ip4:134.128.96.0/19 no match
  13. include:ab.sendgrid.net no match
    • ab.sendgrid.net returned softfail
  14. record for ab.sendgrid.net v=spf1 ip4:223.165.113.0/24 ip4:223.165.115.0/24 ip4:223.165.118.0/23 ip4:223.165.120.0/23 ~all
  15. ip4:223.165.113.0/24 no match
  16. ip4:223.165.115.0/24 no match
  17. ip4:223.165.118.0/23 no match
  18. ip4:223.165.120.0/23 no match
  19. ~all softfail
  20. ~all softfail

DNS queries

NameTypeResultSourceTime
sendgrid.net TXT NOERROR dns 27.8 ms
ab.sendgrid.net TXT NOERROR dns 8.3 ms

Answers marked shared cache came from a recent check by someone else and cost no network round trip; cache means the same name was needed twice within this one evaluation. Entries expire after a minute, so if you have just changed a record, allow that long before the change shows here.