yoyo.quintex.com has no MX records.
Question and response
Question
dig yoyo.quintex.com. MX
Answer
The response has no answer records.
Authority
quintex.com. 3600 SOA phoenix.quintex.com. john.quintex.com. 2023126623 60 60 60 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0