I use 123-reg as my domain registrar, I found this DNS Management Guide on there site.

Its not a very big book; but it gives a nice quick overview to DNS, and gives examples of how to use different records.

A records, CNAME records, MX records, nameservers…… confused?

What will this guide help me with?

This guide contains information on the following areas:

  • What is DNS?
  • What are subdomains?
  • What are nameservers?
  • How do I check my nameservers?
  • How do I change my nameservers?
  • Setting up an A record
  • Setting up a CNAME record
  • Setting up a TXT record
  • Setting up an SPF record
  • Setting up an MX record
  • How do I point to my own mail server?