Apple Mail drives me mad. It recently garbled several of my mail accounts. Also, there seems to be an undocumented (and possibly unintentional) restriction in using different passwords with the same SMTP server. I quite like Airmail and I like the ability to send HTML emails but, unlike Apple Mail, its Send Later function doesn't work. I wondered about moving to Outlook (as I already subscribe to Microsoft 365) but experience with it on Windows doesn't inspire much confidence. I would appreciate any advice.