Verifying your No-IP domain with Google Apps
There are three different methods that Google will use for verification:
We've recently added the ability to add your own DKIM records to your account! From the 'Hosts/Redirects' tab select the host you'd like to modify and then click on the 'DKIM' link within the Advanced Records section. Follow the instructions given to you by Google and paste in the corresponding values. If you were not given a DKIM record from Google do not panic, most verifications are done by the simple TXT entry that is described below.
For the remaining two TXT records, you would need to modify your root domain(yourdomain.com) from the 'Hosts/Redirects' tab of your account. Within the next screen you'll find the advanced records section which includes a link for TXT entry labeled as 'TXT'. Google should have provided you with the string required for your verification. If an SPF record was requested it should look something like the following: v=spf1 include:_spf.google.com ~all. This ensures that the Google Apps mail servers are authorized to deliver mail from your domain.
Lastly, a domain verification can be made using a unique string(security token) given to you via your Google Apps control panel. This string is usually 68 characters long starting with google-site-verification followed by 43 characters. This again is added via the TXT link on "advanced records".
While Google will have its own method of verifying that the task has been completed, you can too by performing a DIG operation on your domain. This can either be done from a terminal window or at sites that have created such tools.
The syntax to perform your DIG would be:
dig yourdomain.com TXT +short
and you should see your entry in the answer section for TXT.