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I haven't seen a DSPAM false positive in many months. Once trained, it's exceptionally accurate and very low-maintenance. I've been using DSPAM for at least two years, and have been quite impressed with it. SPF is not a statistical filter.

Your handling of mail received at an expired ("rotated") address looks to be a sticking point, to me. If Segmail sees an invalid password, "it marks it as junk (bounces it, deletes it, challenge/responses it, moves it to a different folder, whatever)". If a legitimate message is bounced or challenged, the sender might decide instead to abandon the contact -- this is one of challenge/response's sticking points. Legitimate message deletion is a big sticking point with unintelligent filters.

You say that "No legitimate mail will ever get filtered", but what happens if a correspondent doesn't have your most recent address? "it marks it as junk (bounces it, deletes it, challenge/responses it, moves it to a different folder, whatever)". In any except the quarantine response, the legitimate mail will be filtered, perhaps into the bit bucket.

Live like you want to live. I was merely suggesting that you consider alternatives that already exist and have been proven in the real world by thousands or tens of thousands of users.

In reply to Re^3: RFC: Email 2.0: Segmail by gloryhack
in thread RFC: Email 2.0: Segmail by tomazos

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