iasmtpr.essote.fi has no MX records.
Question and response
Question
dig iasmtpr.essote.fi. MX
Answer
The response has no answer records.
Authority
essote.fi. 3600 SOA dns1.louhi.net. hostmaster.louhi.net. 2016040830 3600 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0