See why Postbox`s features make it the best email client for Mac

Postbox for Mac

Browse by Company

Adobe, Apowersoft, Autodesk, Avast, Corel, Cyberlink, Google, iMyFone, iTop, Movavi, PassFab, Passper, Tenorshare, Wargaming, Wondershare

Postbox 4.0.3

  -  25.48 MB  -  Trial
Free Download

Security Status

  • Latest Version

    Postbox 7.0.63

  • Operating System

    Mac OS X 10.7 or later

  • User Rating

    Click to vote

  • Author / Product

    Postbox, Inc. / External Link

  • Filename

    postbox-4.0.3-mac64.dmg

  • MD5 Checksum

    bf3bc7749309d974505aa7877daf26da

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Postbox 4.0.3.


For those interested in downloading the most recent release of Postbox for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


We would love to hear from you

If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download Postbox 4.0.3

  • Postbox 4.0.3 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    Postbox 4.0.3 Screenshot 1
  • Postbox 4.0.3 Screenshot 2
  • Postbox 4.0.3 Screenshot 3
  • Postbox 4.0.3 Screenshot 4
  • Postbox 4.0.3 Screenshot 5

What's new in this version:

- URL autocomplete in the Quick Bar
- URLs are now auto-linked when entered using the Quick Bar
- Initiate Quick Bar when typing www. or http: or https:
- Enhanced the way Topics are assigned in the Quick Bar
- Postbox will now remember the full-screen preference when quitting the app
- Updated the Config Data screen to include additional information
- Adjustments to Summarize Mode to improve compatibility across email clients
- Fixed an issue where Reply-All wouldn't add all addresses in Summarize Mode
- Fixed an issue where message selection could be lost after Quick Move or assigning Topics
- Fixed an issue where languages in the spelling pull-down would repeat values
- Fixed an issue where removing one label would remove them all
- Fixed an issue where addressing fields would not display if domain fencing fields were enabled and null
- Fixed an issue that would prevent the French Dictionary from loading
- Fixed an issue when opening an account in a new window would also open extra tabs

Top Downloads

More Popular Software »