Vmailmgr provides a virtualizing password-checking interface to qmail-pop3d and courier IMAP as well as both a delivery agent to automatically deliver mail within a virtual domain and a set of tools to manage such a domain from either the command line or from the web.
Created attachment 570 [details] vmailmgr-0.96.9.ebuild
Somehow I missed this one. Fortunately it's already been added to the tree. Sorry about that. Incidentally, you don't want to use ${A} in ebuilds, and "emake" is generally a better choice than "make" in src_compile().