Most mail clients have extensive filtering capabilities, so that incoming mail can be automatically sorted into various folders. The drawback to this system is that you end up jumping around from one folder to the next looking for new mail. A great, BeOS-only solution to this problem can be found in one of Postmaster ’s coolest features: Virtual Folders.
You can set up Virtual Folders to pick up all mail that has ‚New‘ in the status attribute. Then all you have to do is access your ‚New Mail‘ virtual folder and read all your new mail. The mail will automagically disappear after you have moved to the next item (since it won’t be marked as New any more), and will be safely nestled in it’s assigned folder (according to your filters).