John Levine wrote:
If you're going to count the port 25 packets, it seems to me that a
much cheaper and equally effective approach would be to forget about
money and let networks set hourly or daily ingress quotas for their
peers. If someone on network A sends a huge blast of spam to network
B, they'll hit their daily limit at 12:05 AM, and no more mail over
that path until tomorrow. Then network A has to deal with the
complaints from its own users that their mail is falling on the floor.
This is similiar to what the Daum company in Korea does. (They run a
popular Korean webmail system.)
It works basically like this:
1) They have a whitelist of known high-volume servers which can send
mail without limit.
2) Anyone else can send only a limited amount of mail per day to their
servers.
3) A high-volume sender can apply to be whitelisted, or they can pay a
certain amount to send mail to their servers. However, this payment is
more like a bond because they also have buttons on the recipient's email
for them to vote whether they wanted it or not. If there is a
definitive feedback that the mail is wanted, they will be added to the
whitelist instead. Lots of bad feedback and the sender may be refused
anyways.
You can read more about it from a presentation about it:
http://apcauce.mail.daum.net/meeting/meeting_2nd/yonnie.pdf
In the presentation they call it an online stamp system, but most
senders don't need to actually pay anything.
Disclaimer: As you will notice from the above URL, Daum's employees are
heavily involved in the Asia-Pacific chapter of CAUCE, and they host the
APCAUCE web site and mail server.
--
James Lick -- 黎建溥 -- jlick(_at_)jameslick(_dot_)com -- http://jameslick.com/
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg