RE: [Asrg] Several Observations and a solution that addressesthem all

[Kee Hinckley <nazgul@somewhere.com>]

At 12:08 PM -0500 3/11/03, Jason Hihn wrote:
> Dispatch is the heart of it all. It will pass on the request to sub mail
> servers if it cannot be determined on this one. It also makes sure that the
> connection comes from a recenelty sent-to domain to keep spammers from
> asking for validations of email addrs out of the blue.
What you said was that it was "trivial".

What you have described requires that the primary and secondary MXs 
for a domain all run custom software which connects to the 
centralized server that sends all email for a domain, and that that 
server keep track of all outbound mail, who it came from and where it 
went.  And it assumes by convention that nobody from that domain is 
allowed to send email via any other server.

There's also another little problem.

MAIL FROM:<jhihn@paytimepayroll.com>
RCPT TO:<nazgul@somewhere.com>

Now I go back to your server and say, "is jhihn@paytimepayroll.com a 
valid address" and your server says, "what the hell are you talking 
about, I've gotten hundreds of queries about this person, but they 
did not send mail to nazgul@somewhere.com, they only sent email to 
asrg@ietf.org.  Must be a spammer.  Not valid."

So if you want this to work you need to extend the SMTP protocol. 
There isn't enough information in the transport to uniquely identify 
a message.

But in any case, it's clear that the operative word is *not* "trivial".
--
Kee Hinckley
http://www.puremessaging.com/        Junk-Free Email Filtering
http://commons.somewhere.com/buzz/   Writings on Technology and Society

I'm not sure which upsets me more: that people are so unwilling to accept
responsibility for their own actions, or that they are so eager to regulate
everyone else's.
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