mail01.cablecolor.com.sv has no MX records.
Question and response
Question
dig mail01.cablecolor.com.sv. MX
Answer
The response has no answer records.
Authority
cablecolor.com.sv. 86400 SOA ns1.cablecolor.com.sv. administrador.cablecolor.co.sv. 2026012602 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0