Barry Shein <bzs(_at_)world(_dot_)std(_dot_)com> top-posted:
It's their dsl customer, why wouldn't they?
Because they do NOT want to encourage email coming from it, that's
why.
There is absolutely _no_ reason to publish an SPF record for any IP
address you don't want to authorize to emit email that claims to be
from your domain.
But that's nothing to do with the SPF spec, per se, and my guess is
that without some external force (unlikely) you'll have billions who
do, and billions who don't.
Somebody who publishes SPF records for spammers will quickly find all
of their SPF records untrusted, which is not a good position to be in.
Seth
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg