ns7.telmexla.net.co has no MX records.
Question and response
Question
dig ns7.telmexla.net.co. MX
Answer
The response has no answer records.
Authority
telmexla.net.co. 300 SOA ns1.telmexla.net.co. internet.telmexla.net.co. 2024042901 1200 7200 1209600 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0