Apple Mail is a wonderful application with a well rounded feature set. Having said that, it doesn’t always fill every email need. If you find Mail lacking in some specific way, perhaps one of the many available plugins can fill the void.
One of the best resources on the web to find Mail plugins, both free and commercial, can be found here.
This site, while nice, is obviously no match for Hawk Wings, which continues to be an indispensable resource for all your Mail.app needs.
Enjoy!
