mail.jangomail.com has no MX records.
Question and response
Question
dig mail.jangomail.com. MX
Answer
The response has no answer records.
Authority
jangomail.com. 180 SOA ns11.constellix.com. dns.constellix.com. 2015010465 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0