Outlook for Mac 2011 DNS settings issues

I am constantly getting these popup window alerts for my Outlook for Mac 2011 every few minutes"

"Outlook cannot find the server. Verify the server information is entered correctly in the Account Settings, and that your DNS settings in the Network pane of System Preferences are correct."

The last digit of my DNS number is different from my IP address. Is the DNS number supposed to exactly match my IP address of should it be different? Is something else causing this to happen?