img.mailcomp.net has no CNAME records.
Question and response
Question
dig img.mailcomp.net. NS
Answer
The response has no answer records.
Authority
mailcomp.net. 101 SOA x.ns.joker.com. hostmaster.joker.com. 2024110768 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0