Chris Haynes wrote:
The SPF policy (the IP addresses it identifies), is
time-sensitive.
DNS TTLs make this somewhat fuzzy whatever the SPF spec. says.
the SPF policy used to test an IP address MUST be the version
which was current at the time of the transaction involving
that address.
More than a SHOULD is tricky, and if this prolem is a MUST,
then the other identities PRA abuse is a 100% clear SHALL NOT.
Bye, Frank