Please note that add-ons are no longer supported as of Postbox 6.0. Add-ons developed by Postbox, Inc. will be added to the core Postbox product. Legacy add-ons are available here for customers who are using older versions of Postbox.
Installation
- Download the Add-on to your computer, such as the Desktop.
- In Postbox, go to the Tools menu and select Add-ons.
- Click the Gear icon or button in the upper right corner, then select Install Add-on From File...
- Browse to the location of the add-on and select it.
- Restart Postbox.
Troubleshooting and Support
Add-ons can change the DNA of Postbox in ways that are incompatible with its default behavior. If Postbox is not operating the way you expect, then temporarily disable add-ons to see if the problem clears up for you.
Postbox does not support the functionality of 3rd party add-ons, as it is up to each developer to support the functionality of the add-ons they author. If an add-on is not working correctly, please contact the add-on developer directly.
Postbox 5 Add-ons
| Name | Company | Description | Download |
|---|---|---|---|
| macOS Sharing 1.0.2 | Postbox, Inc. | Allows content to be sent through Postbox using the macOS Share menu. Only available for Postbox 5 | Download | Instructions |
| 70 Email Templates Every Business Needs 1.0 | Postbox, Inc. | 70 professionally written email responses that anyone can customize and use. You'll receive emails for finding a job, hiring, making introductions, reaching out to investors, sales, and more. Only available for Postbox 5 | Download | Instructions |
| 25 Beautifully Designed Email Signatures 1.0 | Postbox, Inc. | 25 professionally designed email signatures that will present you in the best light possible. Each signature is fully customizable, and contains all the code examples you need to make a lasting impression. Only available for Postbox 5 | Download | Instructions |
| Cloud File Sharing Add-on 1.1.1 | Postbox, Inc. | Share links to your Dropbox, Box, and OneDrive files instead of mailing the files themselves. Only available for Postbox 4 and 5. | Download | Instructions |
| Vacuum Postbox 1.1 | Postbox, Inc. | Adds a "Tools | Indexing | Vacuum..." menu item which allows you to vacuum your Postbox index to reclaim disk space and improve performance. | Download |
3rd Party Add-ons
These add-ons are not developed or supported by Postbox, Inc.
| Name | Company | Description | Download |
|---|---|---|---|
| Markdown Here | Adam Pritchard | Markdown Here allows you to write complex email in simple text, never taking your hands off the keyboard. | Download |
| SpamSieve | C-Command Software | Integrate Postbox with SpamSieve's powerful junk filtering on macOS (requires download and purchase of SpamSieve from C-Command Software). | Download for macOS |
| 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. | macOS | Windows |
| MinimizeToTray Revived | Nils Maier | Minimizes Postbox to the system tray on Windows. | Download |
| MailHops | Andrew Van Tassel | MailHops maps the route an email took to get to you. | Download |
| QuickFolders | Axel Grude, Alexander Malfait | Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. | Download |
| SmartTemplate4 v1.4 | Axel Grude, Marky Mark | SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. | Download |
| Zombie Keys | Axel Grude, Kai Bolay | This extension implements Microsoft's Keyboard shortcuts for international characters. | Download |