mail2.ikb.at has no CNAME records.
Question and response
Question
dig mail2.ikb.at. NS
Answer
The response has no answer records.
Authority
ikb.at. 5526 SOA ns1.ikbnet.co.at. admin.ikb.at. 2026021902 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0