Can’t decide on which Postbox edition to use?
Use this handy comparison chart to pick the Postbox version that’s right for you. Remember, the premium version of Postbox has a free 30-day trial, and you can switch between the two products at any time.
Postbox releases a free slimmed down version. I wonder if this is due to the upcoming next release of Thunderbird which may have many of the features but be free.
Personally I believe a lot of users will be tempted to upgrade as Postbox has a really nice feature set and with connection to Calendar is a easy replacement for the somewhat limited mail app on Mac, connection to Things and Omnifocus will be pleasing to some.
But against Outlook? not so sure. Especially if as rumored, Outlook comes with the next Mac: Office. Beats it on price but maybe not functions.

