Actually I meant you make the "public" e-mail address totally random, like "ksdjfksjlfdjasljhflsk@whatever.com". That address then forwards to "yourname+ksdjfks

Actually I meant you make the "public" e-mail address totally random, like "ksdjfksjlfdjasljhflsk@whatever.com". That address then forwards to "yourname+ksdjfksjlfdjasljhflsk@whatever.com". Then both your client and mail server will know both the "public" part of the address, and who it's supposed to really be delivered to. This enables spam filtering on a specific alias, or killing a specific alias. Additional support would need to be added to handle these features, and also automatically translating replies from your mail client so the From: address continues to be hidden. This idea mostly already exists in proprietary e-mail relays like Craigslist email addresses, but it would be nice if it were a standard.