ecp.sv1.servidoresactivos.com has no MX records.
Question and response
Question
dig ecp.sv1.servidoresactivos.com. MX
Answer
The response has no answer records.
Authority
servidoresactivos.com. 1800 SOA melinda.ns.cloudflare.com. dns.cloudflare.com. 2395344048 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0