You can't, at that point you assume your correspondent is compromised. It's not just recall but also malware and credential stealers. Doesn't matter if recall is taking screenshots, if the messaging client itself is pwned via malware then they have full access to as much history as is available.
If the content CNA be displayed, it can be parsed by recall.
The only way I can see to bypass it is to obtain DRM keys and display your content on a website only if widevine is active, like Netflix does. Surely it can't screenshot DRM protected content, but also this is Microsoft .
Lol what if microsoft accidenttly gives people a way around that. Want to screenshot something from netflix? Just watch it then look where recall stores all the screenshots!
Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
In this community everyone is welcome to post links and discuss topics related to privacy.
much thanks to @gary_host_laptop for the logo design :)