ns2.ccrtc.com has no MX records.
Question and response
Question
dig ns2.ccrtc.com. MX
Answer
The response has no answer records.
Authority
ccrtc.com. 240 SOA ns1.ccrtc.com. netadmin.ccrtc.com. 2026021300 14400 900 86400 240
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0