Is there a way to make MP’s actually really private ? Where an admin can not access other members MP’s unless there’re invited with a flagging or a tag ?

Yes, check Discourse Encrypt (for Private Messages)

MP's tatsächlich privat machen

Falco (Falco) 3. Dezember 2020 um 15:12 2

Thema		Antworten	Aufrufe
How to make it so that admins are not able to view private messages of their users? Support	12	1945	8. September 2022
How alert if admin/mods read users PM? Support	10	1257	16. März 2022
Are PMs truly private and not crawlable? Community Building	4	1290	16. August 2020
Can I view private messages as an Admin? Support	13	5198	14. September 2020
Can true private messages be implemented? Feature	29	5694	9. März 2020