posti.planeetta.fi has no CNAME records.
Question and response
Question
dig posti.planeetta.fi. NS
Answer
The response has no answer records.
Authority
planeetta.fi. 899 SOA ns.planeetta.net. abuse.planeetta.fi. 2026022601 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0