smtpjk3.mycimbsecurities.com has no MX records.
Question and response
Question
dig smtpjk3.mycimbsecurities.com. MX
Answer
The response has no answer records.
Authority
mycimbsecurities.com. 300 SOA dns1. hostmaster. 2014111368 900 600 1296000 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0