Based on recent discussions, I would suggest an update to the requirements:
1. must minimize unwanted messages to some acceptable level
2. must not affect delivery(latency, integrity, cost, reliability) of
wanted messages to a point that would effect the normal use of email
2a) must not require that any message be accepted or rejected
Much of the discussion around anti-spam systems indicates that most
people think that anti-spam systems are "either-or" type of systems.
i.e. As a result of applying the system to the message, it is either
accepted or rejected. I would like to discourage such thinking.
Anti-spam systems should be designed to give the local administrator
more information with which to make accept/reject decisions. The
systems themselves hould not require that the adminstrator do anything
with the message, as the action taken after deciding a message is spam
is entirely up to local site policy.
Alan DeKok.
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg