After updating to macOS 10.14 Mojave, the Anti-Oops! feature no longer works in Mail?
Before going forward, in order to fix this problem or error 6020, make sure you are using the most up-to-date version of Antidote. Instructions are available here.
Then, follow these steps to activate your Antidote’s Anti-Oops! feature in Mail 12.0:
Launch Mail 12.0
Open Mail preferences: Mail menu > Preferences…
In the window that appears, select the General tab
- Click on the Manage plug-ins… button located on the lower left part of the window
- Check the Antidote – PJ.mailbundle box
- Click on Apply and Restart Mail.
If the problem persists, please submit a request from our Help Center.