ip-66-159-121-41.static.csolve.net has no MX records.
Question and response
Question
dig ip-66-159-121-41.static.csolve.net. MX
Answer
The response has no answer records.
Authority
csolve.net. 900 SOA ns1.vianet.ca. dns.vianet.ca. 1756302055 600 900 604800 900
Additional
The response has no additional records.