cable.dynamic.v4.ziggo.nl has no MX records.
Question and response
Question
dig cable.dynamic.v4.ziggo.nl. MX
Answer
The response has no answer records.
Authority
cable.dynamic.v4.ziggo.nl. 60 SOA rns1.upc.biz. hostmaster.chello.at. 1 3600 600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0