spam.igetapp.com has no CNAME records.
Question and response
Question
dig spam.igetapp.com. NS
Answer
The response has no answer records.
Authority
igetapp.com. 1210 SOA uma.ns.cloudflare.com. dns.cloudflare.com. 2395252277 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0