Postbox is basically Thunderbird with system integrations, last I looked. I tend to find Gmail easier (and more pleasant) to use than Thunderbird, but I also ha

Postbox is basically Thunderbird with system integrations, last I looked. I tend to find Gmail easier (and more pleasant) to use than Thunderbird, but I also haven't checked out Postbox for awhile to see how it's progressed. It's sure to be more powerful, as is the Mailmate client mentioned earlier. I'm just not sure how "Maclike" the UIs will be.