Outlook for Mac

SpamSieve
1

The new spamsieve V3 works for outlook for mac without having to revert to old outlook?

2

You still need to uncheck New Outlook because New Outlook doesn’t support AppleScript yet.

3

Note that unchecking New Outlook will make you add all your accounts again, one by one. Personally I use Mail for work and personal email, while Outlook for Mac is only used for my Gmail accounts. Not a big issue, but noteworthy.