Comment 2 for bug 119028

Address extensions aren't universally supported. I know in Postfix you must specifically enable them, and I don't remember what the default is. I think there's only a small (but vocal) audience for +addresses. Which is not to say we shouldn't support their use! I fully agree that we should.

Having said that, I'm not sure I see the use case for treating these addresses any differently than an other address. You can't /know/ that a +address is treated specially by the recipient, so you have to expect that they aren't. OTOH, allowing a user to hide addresses (even +addresses) is a good thing.

Addresses are already hidden by default though aren't they? Who are we hiding them from?