interoute.net has no MX records.
Question and response
Question
dig interoute.net. MX
Answer
The response has no answer records.
Authority
interoute.net. 600 SOA ns63.domaincontrol.com. dns.jomax.net. 2025081800 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0