Postbox 4.0.3
Postbox has issued version 4.0.3 of its eponymous email client, a maintenance release that provides several improvements and bug fixes. The update adds URL autocompletion in the Quick Bar (which can be accessed by pressing Command-L in the Compose window; learn more about the Quick Bar from the Postbox blog), and URLs are automatically linked. Additionally, Postbox enhances how Topics are assigned in the Quick Bar, remembers your full-screen preference when quitting the app, fixes a bug that prevented Reply-All from adding all addresses in Summarize mode, resolves a problem where message selection could be lost after a
Quick Move or when assigning Topics, fixes a bug that removed all labels if just one label was removed, and ensures that the dictionary in the French localization loads properly. ($15 new, free update, 25.5 MB, release notes, 10.9+)
Postbox looks good, but note that there is absolutely no support unless you pay $10/incident. There isn't even an official public forum (someone did set up an unofficial Google Groups forum, but there's only about two posts a month).