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by anton_gogolev 4190 days ago
Gmail Plus Addressing[0] is very similar to what you're suggesting.

[0]: http://webapps.stackexchange.com/a/2594

1 comments

The websites that are smart enough to count '+' as a valid character are probably smart enough to strip off that part when selling your email.
There might be cases where that is true, but I haven't found that to be the case. I've caught a couple services distributing my email with the '+' in it.
Then bounce everything sent to the root.