Practices (3)

Define some CNAMEs
What if invalid use of CNAMEs is contained?

Define reverse mapping zones for your segment
note that you need a different zone file for this

Define IPv6-related RRs for your zone(s)
AAAA
PTR for IPv6 reverse mapping

Play with MX
install a mail server (e.g. postfix)
define MX for you domain
check if you can send e-mail to your domain