Check What Authentication Are Accepted on a Smtp Server (With Msmtp)
Fleeting- External reference: https://github.com/marlam/msmtp/issues/57
msmtp -S –host=outlook.office365.com –port=587 –tls=on –tls-starttls=on
msmtp -S –host=outlook.office365.com –port=587 –tls=on –tls-starttls=on