ip73.static.mediacommerce.com.co has no MX records.
Question and response
Question
dig ip73.static.mediacommerce.com.co. MX
Answer
The response has no answer records.
Authority
ip73.static.mediacommerce.com.co. 86400 SOA name1.mediacommerce.com.co. abuse.mc.net.co.ip73.static.mediacommerce.com.co. 315858684 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0