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I started using Postbox Express because it supports Omnifocus, but now I'm eyeing Postbox itself, which is a $39.95 application. Given that it's a variant of Thunderbird, what features does Postbox provide for that $40 that Thunderbird 3 does not?

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For one thing, Postbox is a Cocoa application. Thunderbird isn't. So you can take advantage of some features you can only do in Cocoa applications. Such as pressing Control+Command+d to get an inline definition of a word. And in my opinion, Postbox looks one heck of a lot better than Thunderbird.

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I just tried it, it doesn't work. Popup menus and the toolbar aren't native/Cocoa either. – Daniel Beck Dec 21 '10 at 9:51

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