Here's a photo of all 15 favorite icons with Postbox highlighted:
It was great to see Jon Trainer's icon for Knapsack, designed by my friend Fernando Lins in the mix as well. Congratulations John and Fernando!
Postbox - I love the Postbox icon for its clean, graceful design that represents the elegant user interface within the application. If you’re unhappy with the built-in Mail application on your Mac, Postbox is a great alternative. Featuring unified account groups that allow you to combine all of your email accounts in to one inbox; a quick reply feature that lets you respond to emails without the need to open a separate window; intuitive conversation views; and much, much more. It’s simple, clean UI is a pleasure to use and it’s well worth its $29.95 price tag.