I am running SpamSieve on my main system using B6 upgraded from the previous version and all is fine.
I just got a MacBook Pro with fresh install B6. But the Bundle allowance does not show. I manually installed it and gave the Accessibility Permissions to SpamSieve. I removed the bundle, restarted Mail, quit, put the bundle in place. Still no permissions or bundle loading.
Please check whether SpamSieve shows up checked under the Application Data list and (if so) ask it to install the plug-in again. If that doesn’t work, please tell me exactly what the error message says.
It did not show up there. I added it, deleted SpamSieve preferences and the Bundle folder in ~/Library/Mail and started the process over.
This time it worked.
BTW, so you know how to enable an app to send AppleEvents under Mojave? I have an app that is not triggering the permission request and thus cannot send events.
Unfortunately, I don’t think there’s a way to manually add apps to Security & Privacy ‣ Privacy ‣ Automation, as you can for Application Data. You have to rely on the system prompting you when the app first tries to send an Apple event. However, sometimes the system gets confused, and you can get it to ask again by resetting the privileges using this Terminal command: