Here's a crib sheet for the private, invitation only unix systems operated by Andy Davidson.

Receiving Mail - Encrypted IMAP (SSL) from chilli.nosignal.org.
Sending Mail - Use your ISP's smarthost, or Authenticated SMTP over TLS to chilli.nosignal.org

DNS Servers - Authority DNS is hosted on ns2.org.uk, and ns0.us. If we master a zone, ns2.org.uk will be the master.

chilli is one of three irc servers in a small network that you can connect to using irc.nosignal.org