ns1.tekside.io has no MX records.
Question and response
Question
dig ns1.tekside.io. MX
Answer
The response has no answer records.
Authority
tekside.io. 180 SOA ns1.tekside.io. ipsupport.tekside.io. 2015010385 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0