Mail::TempAddress is winging its way toward the CPAN right now (the link is there for early adopters). It's similar to Mail::SimpleList in that it allows the easy creation and use of simple, temporary mailing thingies. In this case, it's addresses, not lists.
The similarities run pretty deeply; I plan to factor out the common code into another set of modules (as my plans go beyond just these two modules it's a whole theme!). I'm having trouble coming up with a name, though.
I tried something a little different with TempAddy. Installation is more difficult, but it works very nicely once you get past that hurdle. I expect overworked sysadmins will quickly correct my installation instructions in the README.
The trick is to get them to tell me about it.