SPF (Sender Policy Framework)

TTL
SPF SPFv1
Qualifier Mechanism Target / value Valid Details
+ Pass ip4
+ Pass ip4
+ Pass ip4
+ Pass ip4
+ Pass ip4
+ Pass ip4
+ Pass ip4
+ Pass ip4
+ Pass a
+ Pass a
+ Pass a
+ Pass a
+ Pass a
+ Pass a;mx.gmails.jp
- Fail all

SPF issues

  • Unknown or unsupported mechanism: a;mx.gmails.jp
5m