2020-01-15 13:27 AEST by Arthur Barrett - Email plugin (SMTP) should support SSL/TLS

SMTP SSL/TLS 'secure' email is now much more common than when we first wrote this plugin.

We already bundle openssl on widnows, and it's available on linux, so we could make that a dependency.

Perhaps on Linux/Unix we would need the option to compile without this feature.

The main workaround is to use a local SMTP relay, or the external command 'sendmail'.  Using 'sendmail' is a 
very easy option on Linux, so maybe this really should be a windows feature only?