servicedesk.siel.nl has no MX records.
Question and response
Question
dig servicedesk.siel.nl. MX
Answer
The response has no answer records.
Authority
siel.nl. 120 SOA ns1.sielsystems.nl. beheer.sielsystems.nl. 2026030308 1200 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0