ns5.adacor.net has no MX records.
Question and response
Question
dig ns5.adacor.net. MX
Answer
The response has no answer records.
Authority
adacor.net. 3600 SOA ns.europe.adacor.net. hostmaster.adacor.net. 2026022326 28800 7200 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0