lb1-wd5-impl.myworkdaysite.com has no MX records.
Question and response
Question
dig lb1-wd5-impl.myworkdaysite.com. MX
Answer
The response has no answer records.
Authority
myworkdaysite.com. 60 SOA dns1.p01.nsone.net. noc.workday.com. 319 60 60 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0