Outlook is Microsoft’s new data collection service | Proton https://proton.me/blog/outlook-is-microsofts-new-data-collection-service
"Everyone talks about the privacy-washing campaigns of Google and Apple as they mine your online data to generate advertising revenue. But now it looks like Outlook is no longer simply an email service(new window); it’s a data collection mechanism for Microsoft’s 801 external partners and an ad delivery system for Microsoft itself."
