From: MX%"pjnesser@rocket.com" 15-OCT-1995 23:24:02.30 Subj: Re: Motion for a new POST NSF AUP
A better use for your effort is to develop some hacks into majordomo or another mailing list manager that can trivially make a list only accept PGP signed (or whatever your favorite authentication system is) messages that it can confirm with a public keyserver. At the very least all of the major mailing lists that get regularly nailed by spams can transition and we can get some authentication of the culprit.
---> Phil
I had a situation several months ago where a member of the list started spamming one of my lists because he was having problems unsubscribing. After contacting his ISP, I initially had problems with them because they flatly denied that the mail was originating from their host. I introduced a minor modification into the SMTP server which logged the IP address as well as the host name. This provided the evidence that the mail was indeed originating from their host, and they took the appropriate action. -HWM