[N3WBI3]

Sounds like allota work for a little gain. inorder for this to be measurabally useful SMTP will have to be trashed. It would be easier for IPS's to allow users to create white list via some kind of web interface, and for the ISP to force reverse lookup of incoming mail. as for the 250 a month what about listserves?

What you propose would work, but what you get out of it is no different than a person creating a deny *, and putting allowed addresses infront of it.

[Bush2000]

Sounds like allota work for a little gain. inorder for this to be measurabally useful SMTP will have to be trashed. It would be easier for IPS's to allow users to create white list via some kind of web interface, and for the ISP to force reverse lookup of incoming mail.

Some ISPs (ie. Earthlink) do something similar.

as for the 250 a month what about listserves?

The beauty of my scheme is that email senders would have to identify themselves, so listservs could probably get an exception (since they are opt-in/-out).

What you propose would work, but what you get out of it is no different than a person creating a deny *, and putting allowed addresses infront of it.

Not true. It would allow anyone to send anybody mail. But the difference is that it would prevent spammers from sending bulk-mailings.