How to Upgrade
If you purchased from the Postbox Store on or after August 15th, 2011, then you already have a Postbox 3 license key! Simply download the new version from our website (the trial) and Postbox 3 will use your existing license key, mail settings, etc. There’s nothing more to set up!
If you purchased from the Postbox Store before August 15th, 2011, then you are eligible to upgrade to Postbox 3 for only $9.95. Visit the Postbox Store and enter your Postbox 1.x or Postbox 2.x license key during checkout. Next, download the trial version of Postbox from our website and enter your new license key. Postbox 3 will use your existing email settings, so you should be good to go.
If you purchased from the Mac App Store, instructions on how to upgrade can be found in the Postbox Start Page. Select “Home” from the “Go” menu for details (note: Start Page must be set to the default in Preferences / General).
For more information on upgrades and licensing, please see our FAQ.