Use 3rd party service for mail

[MichaelCurrin]

As an extension of #5

Later, extend to send with gmail etc.
The benefit being you do not need to look at the terminal or even be at the machine to see errors.

But you will need to look up a tutorial to see easy modern way to do it with keys. Check if this still works for 2FA enabled account.

Note that the risk is that the machine will offline and the mail fails. So the standard mail should be kept. See if there is an easy way to add to message queue for gmail etc. Maybe have to rely on a background queue process configured to start at startup.