DS-7216HGHI-SH not able to send emails via gmail SMTP

I think this is because when checking the "Enable SSL" checbox, it only incorporates TLS 1.0 where gmail requires at least TLS 1.2 these days.

I just want to be able to receive an email when someone starts driving up our driveway - what's the easiest solution? I don't want to have to pay for a separate email service, presumably there's something free I can use, or some way to get this working with gmail?

Thank you!