DNS recursive error !! If you check your site DNS parameters with intodns.com and see error with DNS Recursive Queries that says:
I could use the nameservers listed below to performe recursive queries. It may be that I am wrong but the chances of that are low. You should not have nameservers that allow recursive queries as this will allow almost anyone to use your nameservers and can cause problems. Problem record(s) are:
If you have your own VPS and Bind installed you can fix this issue by doing those steps:
Login to your webmin and go to Servers->BIND DNS Server
Select Miscellaneous options and there tick “Do full recursive lookups for clients?” to NO
Apply configuration or just restart Bind for changes to take effect