xml.exact.nl has no MX records.
Question and response
Question
dig xml.exact.nl. MX
Answer
The response has no answer records.
Authority
exact.nl. 900 SOA ns-446.awsdns-55.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0