This goes back to the suggestion from myself and others, earlier on.
Once you've moved the mailing list traffic to an RSS-like "pull"
system, you take the next step, and move all e-mail traffic to it.
Now for someone to send you e-mail, they send you the bare URL of their
RSS feed from them to you.
The advantage over the current system is that when an ISP closes off an
account used for spam, all the spam that was sent with that account
gets un-sent, so those who didn't download it yet never see it.
In addition, it puts the bandwidth burden of spam on the site that's
used to send it, rather than on the recipients, hopefully making it too
expensive to leave your mail system insecure.
I have to confess that at this stage I forget what the objections were
that people came up with :-( How's that taxonomy of proposed solutions
coming? I feel it's past time to start cataloging all the proposals on
the web, assigning them names, and collecting the objections.
mathew
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