Postbox now contains add-on capabilities. We are currently focused on helping add-on authors make their existing Mozilla based add-ons compatible with Postbox. If you are an add-on author and would like to make your add-on compatible, please contact us at and we'll be happy to help!
Installing an Add-on within Postbox
- Download and save the add-on to your hard drive. (Firefox users, be sure to right-click the download link, then select "Save Link As..." from the contextual menu.)
- In Postbox, go to Tools | Add-ons.
- Click the Install button and select the file you downloaded and click "OK".
Postbox 3.0 Add-ons
Here are a add-ons that you can use with Postbox 3.0. Please contact the authors of these add-ons if you experience any issues. Note: Postbox 3.0 was recently released so it may take a little while for older addons to be made compatible with 3.0. Thanks for your patience!
| Lightning | Mozilla Calendar Team | Manage your daily schedule directly within Postbox. | Download |
|---|---|---|---|
| Provider for Google Calendar | Philipp Kewisch | Allows bidirectional access to Google Calendar. | Download |
| SpamSieve | C-Command Software | Integrate Postbox with SpamSieve's powerful junk filtering on Mac OS X. | Download for Mac OS X |
| ImportExportTools | kaosmos | Import and Export Messages. | Download |
| Enigmail 1.2 | The Enigmail Team | Send and receive signed and encrypted messages using OpenPGP provided by GnuPG. You also need to install GnuPG. | Download for Mac OS X Download for Windows |
| Virtual Identities | Rene Ejury | Allows you to modify your Identity settings for a single Mail on the fly. | Download (BETA) |
| MinimizeToTray Revived | Nils Maier | Minimizes Postbox to the system tray on Windows. | Download |
| Vacuum Postbox | Postbox | Adds a "Tools | Indexing | Vacuum..." menu item which allows you to vacuum your Postbox index to reclaim disk space and improve performance. | Download |
| MailHops | Andrew Van Tassel | MailHops maps the route an email took to get to you. | Download |
| Zindus | Leni Mayo | Google and Zimbra contact sync. | Download |
| Quicktext | Emil Hesslow | Quicktext lets you create templates that can be easily inserted into outgoing messages. | Download |
| Send Later 3 | Jonathan Kamens | True "Send Later" functionality to schedule the time for sending an email. | Download |
| Zombie Keys (Multilanguage Keyboard) | Axel Grude, Kai Bolay | Enter European languages (which include diacritics (accented characters, diaeresis, umlauts, etc.), ligatures, the Euro sign, etc.) into Postbox using an English keyboard. | Download |
| QuickPasswords | Axel Grude | This simply puts the password where you need it - the login form or your clipboard. | Download |
| QuickFolders | Axel Grude, Alexander Malfait | Open your favorite folders as tabs. Open folders and sub folders, move mails without scrolling around or searching. | Download |
| WiseStamp | The WiseStamp Team | Share your Social profiles and information you care about in your email signatures. | Download |
Postbox 2.5 Add-ons
Here are add-ons compatible with Postbox 2.5. Please contact the authors of these add-ons if you experience any issues.
| Lightning | Mozilla Calendar Team | Manage your daily schedule directly within Postbox. | Download |
|---|---|---|---|
| Provider for Google Calendar | Philipp Kewisch | Allows bidirectional access to Google Calendar. | Download |
| Provider for Microsoft Exchange Calendar | Simon Schubert | Allows bidirectional access to Microsoft Exchange Calendar when using Lightning Calendar for Postbox. | Download (BETA) |
| SpamSieve | C-Command Software | Integrate Postbox with SpamSieve's powerful junk filtering on Mac OS X. | Download for Mac OS X |
| Enigmail 1.2 | The Enigmail Team | Send and receive signed and encrypted messages using OpenPGP provided by GnuPG. You also need to install GnuPG. | Download for Mac OS X Download for Windows |
| ImportExportTools | kaosmos | Import and Export Messages. | Download |
| Highlighter | André Rodier | Adds a button to highlight selected text in your choice of color while composing a message. | Download |
| QuickFolders | Alexander Malfait, Axel Grude | QuickFolders turns folders you select into Tabs. Supports fast navigation, sorting of mails and color customization. | Download |
| Quicktext | Emil Hesslow | Quicktext lets you create templates that can be easily inserted into outgoing messages. | Download |
| Virtual Identities | Rene Ejury | Allows you to modify your Identity settings for a single Mail on the fly. | Download (BETA) |
| Ultra Recall | Kinook Software | Import Postbox messages into Ultra Recall. | Download |
| Zindus | Leni Mayo | Google and Zimbra contact sync. | Download |
| Growl/GNTP | Brian Dunnington | Sends GNTP (Growl) notifications when new messages or feed items arrive. | Download |
| Send Later 3 | Jonathan Kamens | True "Send Later" functionality to schedule the time for sending an email. | Download |
| Undigestify | Jonathan Kamens | Undigestify RFC 1153 digest messages. | Download |
| MailHops | Andrew Van Tassel | MailHops maps the route an email took to get to you. | Download |
| Vacuum Postbox | Postbox | Adds a "Tools | Indexing | Vacuum..." menu item which allows you to vacuum your Postbox index to reclaim disk space and improve performance. | Download |
| Javascript Debugger | Mozilla | Add-on developer tool. | Download |
| DOM Inspector | Mozilla | Add-on developer tool. | Download |
Dictionaries
For information about installing additional dictionaries in Postbox, see this Knowledge Base Article.
Compatibility and Support
Postbox provides a mechanism that allows add-ons from 3rd party developers to be installed within Postbox. However, it is up to each add-on developer to support the functionality of their add-ons they author. Postbox does not provide support for 3rd party add-ons.
Unmodified Thunderbird add-ons do not work within Postbox at this time. Developers of existing Thunderbird add-ons need to port their add-ons to Postbox. Sometimes this can be as simple as changing a few parameters, such as product, version, etc., other times the porting effort may be more complex.
In some instances, such as Lightning, Postbox has performed the necessary porting work to get an add-on to operate within Postbox. We do this so people can get an early feel for how key add-ons will function within Postbox. But we do not support these add-ons, again, because we did not develop them.
We work with extension developers as much as possible, but if there is a particular add-on that you really like, our suggestion is always to contact the add-on developer to have them port their add-on to Postbox.
Postbox 2.1 Add-ons
Here are add-ons compatible with Postbox 2.1. Please contact the authors of these add-ons if you experience any issues.
| Lightning | Mozilla Calendar Team | Manage your daily schedule directly within Postbox. | Download |
|---|---|---|---|
| Provider for Google Calendar | Philipp Kewisch | Allows bidirectional access to Google Calendar. | Download |
| Provider for Microsoft Exchange Calendar | Simon Schubert | Allows bidirectional access to Microsoft Exchange Calendar when using Lightning Calendar for Postbox. | Download (BETA) |
| SpamSieve | C-Command Software | Integrate Postbox with SpamSieve's powerful junk filtering on Mac OS X. | Download for Mac OS X |
| Enigmail 1.1.2 | The Enigmail Team | Send and receive signed and encrypted messages using OpenPGP provided by GnuPG. You also need to install GnuPG. | Download for Mac OS X Download for Windows |
| ImportExportTools | kaosmos | Import and Export Messages. | Download |
| Highlighter | André Rodier | Adds a button to highlight selected text in your choice of color while composing a message. | Download |
| QuickFolders | Alexander Malfait, Axel Grude | QuickFolders turns folders you select into Tabs. Supports fast navigation, sorting of mails and color customization. | Download |
| Quicktext | Emil Hesslow | Quicktext lets you create templates that can be easily inserted into outgoing messages. | Download |
| Virtual Identities | Rene Ejury | Allows you to modify your Identity settings for a single Mail on the fly. | Download (BETA) |
| Ultra Recall | Kinook Software | Import Postbox messages into Ultra Recall. | Download |
| Zindus | Leni Mayo | Google and Zimbra contact sync. | Download |
| Growl/GNTP | Brian Dunnington | Sends GNTP (Growl) notifications when new messages or feed items arrive. | Download |
| ThunderBrowse | GS! Networks | Adds browsing functions to Postbox, allowing you to be able to view websites without having to open another application. | Download |
| ReminderFox | Günter Wahl, Tom Mutdosch, Daniel Lee | ReminderFox displays and manages lists of date-based reminders and ToDos. | Download |
| Send Later 3 | Jonathan Kamens | True "Send Later" functionality to schedule the time for sending an email. | Download |
| Undigestify | Jonathan Kamens | Undigestify RFC 1153 digest messages. | Download |
| MailHops | Andrew Van Tassel | MailHops maps the route an email took to get to you. | Download |
| Vacuum Postbox | Postbox | Adds a "Tools | Indexing | Vacuum..." menu item which allows you to vacuum your Postbox index to reclaim disk space and improve performance. | Download |
| Javascript Debugger | Mozilla | Add-on developer tool. | Download |
| DOM Inspector | Mozilla | Add-on developer tool. | Download |
Postbox 1.1 Add-ons
Here are add-ons compatible with Postbox 1.1. Please contact the authors of these add-ons if you experience any issues.
| Lightning | Mozilla Calendar Team | Manage your daily schedule directly within Postbox. | Download |
|---|---|---|---|
| Provider for Google Calendar | Philipp Kewisch | Allows bidirectional access to Google Calendar. | Download |
| Enigmail | The Enigmail Team | Send and receive signed and encrypted messages using OpenPGP provided by GnuPG. You also need to install GnuPG. | Download for Mac OS X Download for Windows |
| ImportExportTools | kaosmos | Import and Export Messages. | Download |
| Hebrew Calendar | Igor ZC | Show the Hebrew date in the status bar. | Download |
| mailredirect | Pawel Krzesniak and Ronald Wahl | Adds ability to redirect one or more mails to one or more recipients. | Download |
| MinimizeToTray Plus | Michael Buckley | Minimizes Postbox to the system tray on Windows. | Download |
| MozBackup | Pavel Cvrček | Utility for backing up and restoring Postbox settings and mail. Be sure to install version 10.4.10 or higher! | Download (BETA) |
| Nostalgy | Alain Frisch | Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion. | Download |
| QuickFolders | Alexander Malfait, Axel Grude | QuickFolders turns folders you select into Tabs. Supports fast navigation, sorting of mails and color customization. | Download |
| Quicktext | Emil Hesslow | Quicktext lets you create templates that can be easily inserted into outgoing messages. | Download |
| Virtual Identities | Rene Ejury | Allows you to modify your Identity settings for a single Mail on the fly. | Download (BETA) |
| World Weather+ | Mel Reyes (aka: mrtech) | Displays local weather information from around the world. | Download |
| Ultra Recall | Kinook Software | Import Postbox messages into Ultra Recall. | Download |
| Zindus | Leni Mayo | Google and Zimbra contact sync. | Download |
| Growl/GNTP | Brian Dunnington | Sends GNTP (Growl) notifications when new messages or feed items arrive. | Download |
| OpenMedSpel medical spelling dictionary | e-MedTools | A medical spell checking dictionary that includes nearly 50,000 medical terms ranging from abdominis to zygomatic. | Download |
| Javascript Debugger | Mozilla | Add-on developer tool. | Download |
| DOM Inspector | Mozilla | Add-on developer tool. | Download |
| Vacuum Postbox | Postbox | Adds a "Tools | Indexing | Vacuum..." menu item which allows you to vacuum your Postbox index to reclaim disk space and improve performance. | Download |