Just read an article about our friends at Microsoft and the fruits of their research efforts. It contained the little nugget that spam mostly comes from dynamic IP addresses, whereas real mail comes from stable ones.
This makes obvious sense as soon as someone tells you about it, but can it be used to stop the blasted stuff? For instance, is it possible to autodetect the originating IP address of incoming mai - either at the server or on your mail client - and then compare it to a list? Mail from stable IPs gets allowed through. Mail from dynamic IPs doesn't.
You would have to start out by building a list of accepted IP's, probably by flagging incoming mai. Maybe multiple users could share this data co-operatively? Or could there be some kind of registration scheme for authenticated mail servers?
I guess you'd need some kind of plug-in for your mail client to check the origin of the mail. Or could it be done at the server?
Recommend this article...
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