Default to TLS encryption for new Mail accounts
When configuring a new account in evolution the default setting for Encryption method is "No Encryption".
It's pretty much expected default these days that client-to-sever connections for mails are encrypted, therefore I strongly recommend changing the default choice. Ideally "No Encryption" either shouldn't be offered at all or only with a very strong warning.
I'd recommend making "TLS on a dedicated port" the default, it's less fragile than STARTTLS (no stripping/downgrade attacks possible) and generally recommended, STARTTLS was invented as an optional/opportunistic encryption tool, but that's really not what you want these days.