Hello, How can I activate the option manage plugin in MAIL Version 13.0 (3608.60.0.2.5) Catalina ? so I can activate the Mailbuttler plugin…
You should be able to do that easily, by doing the following: go to Mail-Preferences-General-Manage Plug-ins and re-enable Mailbutler.
If you’re not seeing Mailbutler as an option there, you might need to remove other plugins that you have first. Then enable Mailbutler, then add the other plugins back.