Domain Name System Error: Address resolution of such yahoo.com failed: returned answer with no data Could any one help me ,how to solve this issue?

I want to give thanks to a great man who has brought back my happiness to my life. Dr Jumba is really a great man. He helped me with a lottery spell and love spell.  after my lover left me for 2years,i was so frustrated i almost killed myself until i got in contact with Dr Jumba who told me that my ex will be back to me within 24Hours.At first i taught Dr Jumba was a scam until the second day when my lover called me on phone and started begging me that he was sorry that i should forgive him and he bought me a Gold ring and wrist watch i was so happy and really believed that Dr Jumba is really a great spell caster and not a scam like other fake spell caster who are online to add pain to your pain,Please people that need help i will love you people to contact Dr Jumba because i can swear with my life that Dr Jumba is a man to trust.You can contact him on his email him  https://drjumbaspellhome.wordpress.com/

Need to check availability of DNS server. ping and then telnet to server with port.