mcm-telecom.com.mx has no MX records.
Question and response
Question
dig mcm-telecom.com.mx. MX
Answer
The response has no answer records.
Authority
mcm-telecom.com.mx. 86400 SOA dns.mcmtelecom.com.mx. dnsmaster.mcmtelecom.com.mx. 2023012601 259200 85000 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0