ns2.incontact.com has no MX records.
Question and response
Question
dig ns2.incontact.com. MX
Answer
The response has no answer records.
Authority
incontact.com. 300 SOA dal-innsi01.inucn.com. syseng.incontact.com. 5254 900 600 86400 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0