mail1.tdctech.dk has no MX records.
Question and response
Question
dig mail1.tdctech.dk. MX
Answer
The response has no answer records.
Authority
tdctech.dk. 900 SOA auth01.ns.tele.dk. dns.eng.tdc.net. 2026021201 14400 7200 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0