Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: IETF SMTP Working Group Proposal at

  • From: Brad Knowles
  • Date: Thu Aug 22 18:44:34 2002

At 7:20 PM -0500 2002/08/21, J.A. Terranson wrote:

 Presenting a computationally difficult problem to a connecting MTA
 moves the requirement for the CPU power to the sender while keeping
 the recipient site unfettered.  Let's face it, the spam problem is
 merely one of cost shifting from sender to reciever, and this
 proposal shifts the load back.  Any site that wishes to maintain
 the current system of email subsidies to the sender domain need
 only provide a computationally simple token.
Now this is more plausible. You'd still need something akin to a PKI to distribute the computationally simple tokens, and you'd need a way to easily revoke them. But if this was implemented by default in the standard MTAs, you would go from hundreds or thousands of message deliveries per minute to five or more minutes per un-authenticated message delivery.

This is something that might be worth discussing in the appropriate forums, such as the SMTP-related working groups of the IETF.

Brad Knowles, <>

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
-Benjamin Franklin, Historical Review of Pennsylvania.

GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E W+++(--) N+ !w---
O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++)
tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- r---(+++)* z(+++)

Discussion Communities

About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home

Merit Network, Inc.