vm1.mcm.net.mx has no MX records.
Question and response
Question
dig vm1.mcm.net.mx. MX
Answer
The response has no answer records.
Authority
mcm.net.mx. 700 SOA dns2.mcm.net.mx. dnsmaster.mcmtelecom.com.mx. 2026011301 700 600 604800 700
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0