mx2.harriscomputer.com has no CNAME records.
Question and response
Question
dig mx2.harriscomputer.com. NS
Answer
The response has no answer records.
Authority
harriscomputer.com. 91 SOA dns1.easydns.com. zone.easydns.com. 1771355212 3600 600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0