obf1.sth.basefarm.net has no MX records.
Question and response
Question
dig obf1.sth.basefarm.net. MX
Answer
The response has no answer records.
Authority
obf1.sth.basefarm.net. 10 SOA ns01.osl.basefarm.net. support.basefarm.com. 2017114403 86400 3600 2419200 10
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0