I setup Windows 10 mail to use Amazon AWS SES to send emails from packaged Windows 10 Mail and Calander program. I removed the check mark telling it to use SSL,
Setting the port to 587 informs Windows to use TLS
Additionally, I only got it to work with imap with the same setting
Using Amazon SES increases the possibility of your emails, even private one, ending up in the inbox instead of SPAM.
for Windows live mail Port settings see