mx.comfortel.pro has no CNAME records.
Question and response
Question
dig mx.comfortel.pro. NS
Answer
The response has no answer records.
Authority
comfortel.pro. 3600 SOA ns1.comfortel.pro. noc.comfortel.pro. 2026022507 14400 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0