mail.jits.rocks has no MX records.
Question and response
Question
dig mail.jits.rocks. MX
Answer
The response has no answer records.
Authority
jits.rocks. 14400 SOA ns.jits.rocks. admin.jits.rocks. 78 14400 3600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0