Add a loopback SMTP (for webmail) and strip out other args By specifying "[ip.add.re.ss]:type" then we're already implicitly binding to specific IPs We were also duplicating some values from the config

# Based on https://www.nlnetlabs.nl/documentation/unbound/howto-setup/
server:
	interface: 127.0.0.1
	interface: ::1
	access-control: 127.0.0.0/24 allow
	access-control: ::1 allow
        verbosity: 1