dns.nic.at has no MX records.
Question and response
Question
dig dns.nic.at. MX
Answer
The response has no answer records.
Authority
nic.at. 900 SOA ns1.nic.at. domain-admin.univie.ac.at. 2026024931 3600 1800 1209600 900
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0