Occasionally, someone asks how to check their DNS
is properly registered on the Internet.
While this is doable with Nslookup, Dig, or similar tools
it is generally tedious -- here's a site that does it for you
(along with some other email server checks) and it's FREE:
http://www.DNSreport.com
At the upper left edit box, type in your Zone, e.g., LearnQuick.Com,
and press "DNS Report" button to get a nice automatic check.
On the right is a check for your mail server functioning (from outside
your domain and firewalls.)
I reached DNSReport from
http://www.DNSStuff.Com which has
a bunch of other DNS tools (and stuff.)