Re: Scope of SMTP Verify

Jeff Silverman wrote:
>>
>> Well that's the problem. So far we haven't gotten good answers. 
>> Besides "web of trust" and "reputation systems", are the other 
>> possibilities that can be used with identity to reduce spam?
> 
> 
> Kerberos?  You'd have to figure out a way to put a kerberos ticket into 
> a mail message, and the kerberos ticket would have to have a very long 
> life span.
> 
> Kerberos is an authentication system, and if you have a valid kerberos 
> ticket, then somebody can prove that a given instant in time, the sender 
> authenticated himself/herself against an authentication server.
> 

My question here is once you know the identity, what do you do with it? 
Kerberos authenticates the identity and may or may not be used for that, 
but the question is why you have the identity what do you do?

Yakov