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

Postbox for Mac

Postbox 6.0.3

  -  58.03 MB  -  Trial
  • Latest Version

    Postbox 7.0.64

  • Operating System

    Mac OS X 10.10 or later

  • User Rating

    Click to vote
  • Author / Product

    Postbox, Inc. / External Link

  • Filename

    postbox-6.0.3-mac64.dmg

  • MD5 Checksum

    69ae3d1e9f3b155073e61d95b8a3c222

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 6.0.3.


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!

  • Postbox 6.0.3 Screenshots

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

    Postbox 6.0.3 Screenshot 1
  • Postbox 6.0.3 Screenshot 2
  • Postbox 6.0.3 Screenshot 3
  • Postbox 6.0.3 Screenshot 4
  • Postbox 6.0.3 Screenshot 5

What's new in this version:

- Made OAuth2 authorization windows smaller on Windows
- Created work-around for importing mbox files when Local Folders/On My Mac accounts are set to maildir, messages now imported into "Imported Mail" account
- Changed the default mail storage format for Local Folders/On My Mac accounts to mbox to facilitate mbox importing
- Fixed an issue with POP filters that could create bogus message entries dated 1969/1970
- Fixed creating a global filter from a contact
- Fixed shortcut for sending Quick Replies
- Fixed a top crashing bug
- Fixed "Forward as Attachment" contextual menu command
- Fixed an issue with contacts being duplicated in addressing fields
- Fixes to improve content loading in Tabs
- Fixes to improve Trash folder mapping, and disabled Trash folder mapping for Google accounts
- Fixed situations where the wrong unread count could be reported