ns2.integraonline.com has no MX records.
Question and response
Question
dig ns2.integraonline.com. MX
Answer
The response has no answer records.
Authority
integraonline.com. 3600 SOA nsx.integraonline.com. itops.zayo.com. 2025022001 300 7200 604800 172800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0