corpgate.pro has no MX records.
Question and response
Question
dig corpgate.pro. MX
Answer
The response has no answer records.
Authority
corpgate.pro. 1800 SOA kayden.ns.cloudflare.com. dns.cloudflare.com. 2395870826 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0