static.ziggozakelijk.nl has no MX records.
Question and response
Question
dig static.ziggozakelijk.nl. MX
Answer
The response has no answer records.
Authority
static.ziggozakelijk.nl. 86400 SOA ns1.upc.biz. dnsadmin.as9143.net. 2020011302 14400 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0