NOVA: Update email script to decouple AUTH LOGIN PLAIN and STARTTLS from each other; they
were thought to be inclusive features but an SMTP server can have one and not the other.
Small update to a script that will surely see more changes as we run into different SMTP
server settings sets but should solve the case of servers using just AUTH LOGIN PLAIN.

Also cleaned up some imports as they weren't needed anymore and one was actually causing
the script to fail.