cvgmx4.convergys.com has no MX records.
Question and response
Question
dig cvgmx4.convergys.com. MX
Answer
The response has no answer records.
Authority
convergys.com. 900 SOA odcid7.concentrix.net. james\.stegemeyer.concentrix.com. 2014068915 10800 3600 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0