mail02.vemap.com has no CNAME records.
Question and response
Question
dig mail02.vemap.com. NS
Answer
The response has no answer records.
Authority
vemap.com. 242 SOA dns1.ontec.at. admin.ontec.at. 2026012301 10800 3600 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0