dual separator?

[Adam Thompson]

I have a large number of email "tags", but use both "+" and "-" as a 
separator.
So far, I'm entering all the "-" ones into aliases; is there a better 
way to do this?
In postfix, I was able to use a regex to manipulate incoming addresses 
to transform them all into "+", but I don't see a way to do that here.  
Am I missing anything that could help me?

--
-Adam Thompson
 athom...@athompso.net