ednsac01.rightnowtech.com has no MX records.
Question and response
Question
dig ednsac01.rightnowtech.com. MX
Answer
The response has no answer records.
Authority
rightnowtech.com. 900 SOA dnsmasterac01.rightnowtech.com. root.rightnowtech.com. 1769019747 600 180 1209600 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0