DrZaphod writes:

Ah ha! Another facet of a LIST run authentication system [Cypherpunks Run Authentication System - CRASs?] may be to allow users to mail THE LIST and ask their mail to be filtered so they don't have to pay for msgs they don't want. THIS IS DANGEROUS because a forger could mail in such a request.. to patch this, THE LIST could mail out a weekly msg -- a compiled list of which msgs got thru, and which were filtered, and why.

This opens up another possibility which may prove more effective. If THE LIST can maintain a list of msgs/posters/ PGP authentication, then those users who trust THE LIST to authenticate their mail can select the msgs they want to receive [from the same compiled list].

The list software that Ray Cromwell wrote for the Extropians list does all these things. Users can exclude [user|thread] and receive a regular ( I think daily) list of filtered msgs. Users can also set their own mode of receiving the list (reflected or digest), and can temporarily unsubscribe by excluding all. About the only intervention needed by list management is for subscribes and permanent unsubscribes, other than general maintenance. The list also has a security feature that when turned on only accepts posts from addresses previously authenticated as belonging to list members. This can still be spoofed, but at much greater difficulty than LD has had to expend heretofore. Jeff trestrab@gvsu.edu