“Without informing or inquiring about this, Microsoft grants itself access to the IMAP and SMTP login data of users of the new Outlook.”
c’t sniffed the new Outlook sending the IMAP server, username and password to Microsoft’s servers. TLS wraps the trip, but the password sits in plain text inside it, and your mail gets synced to Microsoft’s cloud too. Windows 11 now recommends the app in the Start menu, and it replaces the built-in Mail in 2024. Microsoft says you can switch back any time. Your password stays behind.