Re: "If you believe that the SPF concept is fundamentally flawed,please

Carl Hutzler wrote:
> BTW, this issue of allowing someone to send through "someone else's
> relay" is a problem for ALL email authentication approaches except
> perhaps CSV and BATV. DomainKeys, SPF, IIM, and SID all have an issue
> until we can get MUAs to sign with DK/IIM.
If end-users (MUAs) are to use shared private keys (e.g. for a common 
sender domain), the confidentiality of the private keys is at risk.

If end-users are to use user-specific private keys, they could very well 
use PGP or S/MIME right away.  IMO this is the direction things need to be 
going.

pgpm2xM8Pgei0.pgp
Description: PGP signature