RE: IETF SMTP Working Group Proposal at smtpng.org

["Robert Blayzor" <rblayzor () inoc net>]

> Half the spam I get is from throw away AOL, netzero, 
> earthlink, etc. accounts.  Spend $10 for a new ISP account, 
> sent 10,000 emails with MY return address which is valid and 
> on whitelists.  Do it on a long weekend and get 30k out 
> before you get stopped.

Of course my typical answer here is "those ISP's need to be
responsible".  Quite honestly the simple fix is to firewall all outbound
port 25 connections from non-static IP assignments, and force them to
use specific SMTP servers.  It's possible then to have mail servers
"detect" incoming spam from customers through their mail server farms by
counting a number of messages in a given period of time, then take
action.  These "throw away accounts" you claim are usually simple
residential products in which 99% of all customers don't send over 1000
messages within ten minutes. (example)

I'm just throwing out ideas on trying to deal with the problem.

--
Robert Blayzor, BOFH
INOC, LLC
rblayzor () inoc net

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