zrh.ns.computerline.net has no MX records.
Question and response
Question
dig zrh.ns.computerline.net. MX
Answer
The response has no answer records.
Authority
computerline.net. 900 SOA ns3.036.ch. ns.computerline.ch. 2025113002 900 7200 1209600 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0