Antidote and Mail on macOS Monterey 12.3
Situation
Since updating to the latest macOS 12 update published by Apple, Antidote has stopped working within Mail.
Solution
An update is required in order to reestablish the communication between Mail and Antidote.
For Antidote 11, the update will be proposed automatically by Antidote. You may also get the update by selecting Search for updates… from the Connectix Agent (flask icon located in the menu bar).
For Antidote Web, the update is also available by following this link. This solution is also valid for Antidote 11.
For users of Antidote 10, an update will be available soon. Antidote will warn you once it is available.