This is really two projects; two function-wise identical plugins need to be written for Apple Mail (OS X) and MS Outlook (Windows).
The plugin will make it possible to add an account with a new type of protocol. If you've poked around with Apple Mail and MS Outlook before, its probably mostly cut/paste. If you havent, please dont bid.
You don't need to bid for both Apple Mail and Outlook. There will be two winners. A separate project will be set up for the second winner. Please specify the dev costs distribution for both projects if you intend to bid on both.
Only serious bidders. Please note - all UA violations will be reported.