IPv4 Addresses

TTL

Mail Servers

TTL

SPF (Sender Policy Framework)

TTL
SPF SPFv1
Qualifier Mechanism Target / value Valid Details
+ Pass include
+ Pass ipv4
+ Pass ipv4
+ Pass ipv4
~ Softfail all

SPF issues

  • Unknown or unsupported mechanism: ipv4
  • Unknown or unsupported mechanism: ipv4
  • Unknown or unsupported mechanism: ipv4
5m