mo9.osimsg03.com has no MX records.
Question and response
Question
dig mo9.osimsg03.com. MX
Answer
The response has no answer records.
Authority
osimsg03.com. 600 SOA ns13.domaincontrol.com. dns.jomax.net. 2018092319 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0