mail.secapp.fi has no CNAME records.
Question and response
Question
dig mail.secapp.fi. NS
Answer
The response has no answer records.
Authority
secapp.fi. 60 SOA ns1.secapp.fi. hostmaster.secapp.fi. 2026021800 28800 7200 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0