ns4.dns.amsterdam has no MX records.
Question and response
Question
dig ns4.dns.amsterdam. MX
Answer
The response has no answer records.
Authority
amsterdam. 600 SOA ns1.dns.amsterdam. dns.sidn.nl. 2026022806 1800 600 1209600 600
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0