mail.sokigohosting.com has no CNAME records.
Question and response
Question
dig mail.sokigohosting.com. NS
Answer
The response has no answer records.
Authority
sokigohosting.com. 3600 SOA ns1.loopia.se. registry.loopia.se. 1772802423 14400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0