[Exim] Re: traceability of e-mail vs. stupid DNS tricks....

>>>>> "Greg A. Woods" <woods@???>:

> [ On Thursday, May 8, 2003 at 16:20:27 (+0100), Tony Finch wrote: ]

>> Digression: The anti-spam research group has been arguing a lot
>> about improving the traceability of email. One of their suggestions
>> is to add an RR type to the DNS similar to MX records but for email
>> emitters rather than receivers. Email from a machine that isn't
>> listed as one of the return path's domain's email emitters is
>> therefore obviously forged.

[snip!]
> Those "anti-spam research" guys really don't have a clue what
> they're talking about when it comes to SMTP, DNS, and basic
> networking, and are only grasping at the few straws they think they
> can see (which only demonstrates how desparate they are).

Why is the above mentioned approach so bad?