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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
1 of 2
DNS queries
2
Elapsed
24 ms

How it was evaluated

  1. record for outboundmail.blackbaud.net v=spf1 ip4:205.139.105.48/29 ip4:206.79.6.128/26 ip4:208.40.241.140/30 ip4:216.37.18.6 ip4:204.8.10.114 ip4:216.235.197.198 ip4:64.209.141.221 ip4:205.139.104.0/22 ip4:216.235.196.0/22 ip4:216.235.200.0/21 ip4:216.235.195.0/24 ip4:157.55.136.93/32 ip4:51.132.24.176/32 ip4:13.75.174.156/32 exists:%{i}._spf.sparkpostmail.com ~all
  2. ip4:205.139.105.48/29 no match
  3. ip4:206.79.6.128/26 no match
  4. ip4:208.40.241.140/30 no match
  5. ip4:216.37.18.6 no match
  6. ip4:204.8.10.114 no match
  7. ip4:216.235.197.198 no match
  8. ip4:64.209.141.221 no match
  9. ip4:205.139.104.0/22 no match
  10. ip4:216.235.196.0/22 no match
  11. ip4:216.235.200.0/21 no match
  12. ip4:216.235.195.0/24 no match
  13. ip4:157.55.136.93/32 no match
  14. ip4:51.132.24.176/32 no match
  15. ip4:13.75.174.156/32 no match
  16. exists:%{i}._spf.sparkpostmail.com no match
    • expands to 192.0.2.1._spf.sparkpostmail.com
  17. ~all softfail

DNS queries

NameTypeResultSourceTime
outboundmail.blackbaud.net TXT NOERROR dns 11.1 ms
192.0.2.1._spf.sparkpostmail.com A NXDOMAIN void dns 12.7 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.