mail2.miraqle.com has no MX records.
Question and response
Question
dig mail2.miraqle.com. MX
Answer
The response has no answer records.
Authority
miraqle.com. 86400 SOA udns1.cscdns.net. hostmaster.cscdns.net. 2018112172 86400 86400 86400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0