We currently use CommuniGate on Mac OS X (and are looking to migrate away from it!) - we have a nifty feature where we can create aliases on the fly. For example:
and it routes to email@example.com -- this way we can allow our clients to use an alias to sign up for websites, so if we get spammed we can black hole that individual alias.
I'm aware you can use + -- but most websites don't recognize them. So we switched to underscores.
Is this possible? It's a deal killer/clincher!