smartposti.fi has no MX records.
Question and response
Question
dig smartposti.fi. MX
Answer
The response has no answer records.
Authority
smartposti.fi. 900 SOA ns15.posti.fi. hostmaster.posti.com. 2016060930 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0