Of course you're right, and I can't believe I didn't realize that. I think my point still stands that it's a bit silly to worry about storing emails, but you're

Of course you're right, and I can't believe I didn't realize that. I think my point still stands that it's a bit silly to worry about storing emails, but you're right that you can even avoid that risk by encrypting them if desired. (And "hash" is a bit misleading: http://codahale.com/how-to-safely-store-a-password/ http://codahale.com/how-to-safely-store-a-password/).