exchcas.prewise.fi has no MX records.
Question and response
Question
dig exchcas.prewise.fi. MX
Answer
The response has no answer records.
Authority
prewise.fi. 3600 SOA ns01.prewise.com. hostmaster.prewise.com. 2023100901 1200 600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0