14 Feb
2007
14 Feb
'07
9:45 p.m.
And why not using the existing authentication protocol on outgoing smtp server ? So the sender can use the smtp server of the provider of its email address from any network and SPF can work without any problem.
How would this solve the forwarding problem?
And how are you going to teach everybody to stop doing something that has been working fine for years?
Just have a look at http://old.openspf.org/srspng.html
Yieks!