sns2.treshna.co.nz has no MX records.
Question and response
Question
dig sns2.treshna.co.nz. MX
Answer
The response has no answer records.
Authority
treshna.co.nz. 7200 SOA ns1.linode.com. hostmaster.treshna.com. 2021000007 14400 14400 1209600 7200
Additional
. 0 OPT ; payload 1024, xrcode 0, version 0, flags 0