edgems02.gruposalinas.com.mx has no MX records.
Question and response
Question
dig edgems02.gruposalinas.com.mx. MX
Answer
The response has no answer records.
Authority
gruposalinas.com.mx. 60 SOA ns3.aztecaservicios.mx. admindomains.aztecaservicios.com. 2010120634 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0