static.130.121.14.212.ibercom.com has no MX records.
Question and response
Question
dig static.130.121.14.212.ibercom.com. MX
Answer
The response has no answer records.
Authority
ibercom.com. 86400 SOA ns10.servicio-online.net. hostmaster.ns10.servicio-online.net. 1771750882 14400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0