mail2.smf.ragingwire.net has no MX records.
Question and response
Question
dig mail2.smf.ragingwire.net. MX
Answer
The response has no answer records.
Authority
smf.ragingwire.net. 600 SOA ns1.ragingwire.com. support.ragingwire.com. 2018072647 14400 1800 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0