How ReplyCube uses Mail app extensions on the Mac
Apple initially added support for Mail app extensions with macOS Monterey. Unfortunately, the adoption of the feature has been pretty slow, especially in comparison to Safari extensions. ReplyCube, however, uses support for Mail extensions on the Mac to its advantage.
ReplyCube is based around a standalone application, which is where you create and manage reusable email responses and text snippets. The app allows you to create messages, filter to view certain types of messages and organize them across different categories. ReplyCube’s built-in text editor supports standard formatting options, plus support for images and files.
The standalone app for ReplyCube is simple for a reason, as its primary purpose is for creating and managing these canned responses and categories.
Where ReplyCube shines, however, is with the Mail app extensions. This is where you’ll most commonly interact with ReplyCube.
To enable the ReplyCube extension in the Apple Mail app on your Mac, simply click the “Mail” header in the menu bar, click “Settings,” then “Extensions.” You should see ReplyCube listed in the sidebar, and you can tick the checkbox to enable it. Now, you should see the ReplyCube icon at the top of the compose window when you’re sending or replying to an email.
Clicking on the ReplyCube icon brings up a detailed view of the canned responses you created in the standalone ReplyCube app. There are two ways to add one of these templates to your email. First, you can click the “copy” icon and then manually paste the response into the Mail app compose window. You can also drag a response from the ReplyCube popup right into the Mail app compose window.
ReplyCube also includes apps for iPhone and iPad. These apps let you create and manage your canned responses; you can also copy and paste those responses from the ReplyCube app to the Mail app. The Mail app on iPhone and iPad doesn’t support extensions, which is why you have to use the standalone app to copy and paste your responses.