AOL and Yahoo plan to charge fees of up to one cent (US) per message to those that sign up for the service.
Paying the fees means that messages will not go through spam filters, are guaranteed to arrive and will bear a stamp of authenticity.
I think it's a sensible idea. The only way to beat spam, in the long run.
It will also make it economical for more-targetted 'junk mail' - one recipient in a thousand may buy, to make it economic, something like that.
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An old man who lives in the UK