Licence: Commercial with demo
Version 2.5.1 | Release Date: 2011-07-19 | Download

Vertical Thread Pane View - Postbox now supports a double-row Vertical Thread Pane View, which makes more efficient use of widescreen displays.

Streamlined Message View - We've re-designed the Message View make messages and conversations load faster, with minimal movement and jitter as you page from message to message.

Improved Interface + New Mac Theme - We've made the Postbox interface simpler and more intuitive, plus we have a fresh new theme for the Mac by Benjamin De Cock, and a new icon set by Kenichi Yoshida.

Fast 64-bit Support for Mac OS X - On the Mac, Postbox 2.5 is now running in 64-bit mode, which translates to faster startup, snappier interface elements, and quicker message loading.

Version 2.0 | Release Date: 2010-09-29 | Download
No changes specified
Version 1.1.3 | Release Date: 2010-03-21 | Download

Several stability fixes

Version 1.1.1 | Release Date: 2010-02-08 | Download

* Support for Apple Address Book - Postbox now has the ability to write to the Mac Address Book.
* Support for iCal - If Postbox is your default mail client, iCal will use Postbox for sending out calendar notifications such as scheduling meetings.
* Support for iPhoto - If Postbox is your default mail client, iPhoto will use Postbox to send out photos. Additionally, you can import photos directly from Postbox into iPhoto.
* Spotlight - You can now search your e-mail using Spotlight.
* Dock Icon - You can now drag and drop a document on to the Postbox icon in the dock to bring up a compose window with that document attached.
* Dictionary - You can now select and right click on text to look the word up in the System Dictionary by choosing "Look Up In Dictionary" in the context menu.
* Safari - File / Mail Contents of This Page will now send the URL using Postbox.
* AppleScript - Postbox now supports AppleScript on Mac OS X. More functionality will be added to the Postbox AppleScript dictionary in future versions.
* New Mail Sounds - You can now choose the System Alert Sound when new mail arrives.
* Postbox will now display an envelope or envelope stack icon(s) when dragging messages during move operations.
* Fixed an issue on the Mac where QuickLook was not working for calendar events in the Inspector bar.
* Fixed an issue where opening an attachment on Mac OS X was causing the attachment to be saved to the Desktop.
* Fixed an issue on Vista where drag-and-drop from the Attachments tab failed to save the attachment.
* On Mac OS X, cmd-d and cmd-s now work as keyboard shortcuts to dismiss Save/Don't Save dialogs.
* Fixed a crash during migration from Eudora.
* Incorporated Mozilla Firefox security updates through version 3.5.7.

Version 1.1 | Release Date: 2009-12-03 | Download
  • Improved Performance - Postbox is now faster and more responsive--take it for a test drive!
  • Languages - Postbox now supports community-translated language packs, including German, French, Spanish (Spain), English (British), Italian, Dutch, Portuguese (Brazilian), Russian, and Swedish, with more on the way.
  • New Setup Wizard - When creating a new mail account, Postbox will automatically determine your connection settings for you. All you need to know is your user name, e-mail address, and account password!
  • Better Looking Images - Photos in Postbox are now sharper and have more accurate colors.
  • Interface Improvements - We've polished the Windows 7 and Vista themes to a high gloss shine, and on the Mac, Postbox now sports more native looking UI elements.
Version 1.0.2 | Release Date: 2009-10-26 | Download
  • Improved stability
  • Improved badge in the Mac OS X dock
  • Improved migration from
  • Improved the selected color of messages with assigned topics in the thread pane
  • Fixed an issue where attachments were sometimes attached as inline
  • Fixed an issue with conversation view in newsgroups
  • Fixed an issue where POP users could not download message bodies from conversation view
Version 1.0.2 | Release Date: 2009-10-26 | Download
  • Improved stability
  • Improved badge in the Mac OS X dock
  • Improved migration from
  • Improved the selected color of messages with assigned topics in the thread pane
  • Fixed an issue where attachments were sometimes attached as inline
  • Fixed an issue with conversation view in newsgroups
  • Fixed an issue where POP users could not download message bodies from conversation view
Version 1.0b15 | Release Date: 2009-08-18 | Download
  • Improved Calendar - An updated version of Lightning for Postbox is now available for an integrated calendaring experience.
  • Better Contact Search - Now it's even easier to find anyone you've ever emailed, or who has ever emailed you via the Contacts tab.
  • Easier to Use - Including cross account drag and drop of messages.
  • Faster - Improved search performance and immediate indexing of sent messages.
  • Rock Solid - BETA 15 includes a Crash Reporter, which allows our users to submit a report if they crash. (Of course, our goal is to make it such that you will never have to use this feature.)
  • More Add-ons - Thank you add-on developers! With every release, more add-ons become available for Postbox.
Version 1.0b14 | Release Date: 2009-07-28 | Download
  • Support for the popular Lightning add-on, giving our users an integrated calendar experience
  • More add-ons available for Postbox, including the popular Zindus add-on for Google contact sync
  • Improved theme on Windows Vista and Windows 7
  • Manage which web services you are logged into from Postbox by selecting Tools / Web Services...
  • Improved usability of Facebook and Twitter notification bars
  • Improved performance for message and conversation display
  • Conversation Updates - when reading a conversation and new messages arrive in the conversation, Postbox notifies you and allows you to update the conversation
  • Contacts in the compose window sidebar
  • Incorporated Mozilla Firefox 3.0.12 security updates
  • Direct message notifications from Twitter will now show the sender's Twitter profile picture (if you are signed into Twitter from within Postbox).
  • Improved indexing performance for folders with lots of messages
  • Fixed an issue where double clicking a message to open it in a new tab would cause duplicate values in the Inspector Pane
  • Fixed and issue where local mail conversations were not available when offline
  • Fixed a crash when accessing the Mac OS X system address book
  • Improved stability
Version 1.0 beta13 | Release Date: 2009-06-29 | Download

Beta 13

* Support for add-ons and dictionaries. Learn more.
* Support migrating settings from
* Fetch photos out of the system address book on Mac OS X
* Fetch photos of your Twitter followers
* Improved usability of the Inspector Pane
* Incorporated Mozilla Firefox 3.0.11 security updates
* Improve indexing performance
* Improved stability
* Support reordering accounts in folder pane
* Support drag and drop multiple attachments to the desktop
* Support saving multiple images and attachments at once
* Made several usability improvements for search autocomplete
* Improved tab title when searching
* Show the attachment count in the message header
* Fixed an issue where indexing could get stuck for large folders
* Fixed an issue where dock reports twice as many unread messages on Mac OS X
* Fixed a hang on shutdown issue for IMAP accounts
* Fixed focus issues after opening and closing tabs
* Fixed an issue where printing didn't include the "To" header
* Fixed an issue where quoting selected text for reply didn't work in conversation mode
* Fixed an issue where Postbox would not always offer to migrate from Thunderbird
* Fixed several MAPI issues on Windows
* Fixed the default port for Windows Live / Hotmail accounts to be 587
* Fixed an display issue for locales with non-ASCII translations for "AM" and "PM
* Fixed an issue where you could not create a top level folder under Local Folders
* Attachment icon is now "rolled up" to the conversation level in the thread pane

Version Beta 12 | Release Date: 2009-05-11 | Download

Postbox Beta 12

Version 1.0b11 | Release Date: 2009-05-02 | Download
  • Improved indexing performance
  • Remove the "Mail Folders" virtual folder from the folder pane
  • Reduced memory usage
  • Reduced CPU usage when idle indexing
  • Fixed an issue that could cause the master password to not work
  • Fixed an issue where "Get Mail" would not work for accounts associated with the global inbox
  • Fixed an issue where reply opens a compose window for every message in the conversation
  • Fixed an issue where the junk column position would not persist
  • Fixed a crash when autocompleting addresses in the compose window
  • Several improvements to the signature editor dialog
  • Add support for usernames with special characters
  • Added the ability to one-click add a contact to your Personal Address Book from the contact panel
  • Fixed an issue where copying to the sent folder could fail on Exchange
  • Fixed a hang on closing LDAP connections
  • Fixed a hang on closing IMAP connections
  • Fixed an issue with non-ASCII signature names
  • Fixed an issue in migration from Outlook Express
  • Support for AOL Mail accounts
Version 1.0b9 | Release Date: 2009-03-09 | Download
  • Improved Conversation View - Postbox will now automatically gather messages from other folders when viewing messages by conversation. (You can also set a preference to only display messages within the current folder, see: Preferences | Display tab.) To see an expanded view of all messages within a conversation, click the "Show All" button.
  • Quick Look - For Mac 10.5 users, you can now preview attachments and photos using Apple's Quick Look technology. Select an attachment or photo and press the spacebar to Quick Look, or press the Quick Look button in the Action Bar.
  • Flickr Integration - You can now use the Compose Sidebar to search for and share links to photos from your Flickr account.
  • Hotmail Support - Hotmail POP account setup is now supported within the new account wizard.
  • Other Mac Improvements - More information in Growl alerts, improved notification for unread messages in the Dock, and keyboard shortcut hints in application menus.
  • Performance and Reliability Improvements - See our release notes to review the most recent changes.
Version 1.0b7 | Release Date: 2009-02-08 | Download
  • Postbox has a new application icon and logo!
  • Improve the color of the unread count indicator in the Mac OS X system dock.
  • Fixed an issue where reading a conversation wasn't always marking it as read.
  • Fixed an issue where after switching view layout (classic or vertical), the Inspector pane would no longer work.
  • Fixed an issue where indexing would stop on imported mail.
  • Fixed an issue where the splitter between the thread pane and message pane was too wide in vertical layout mode.
  • Fixed an issue where focusing by topic on a saved search folder would return false positives.
Version 1.0 beta1 | Release Date: 2008-12-21 | Download
No changes specified