ns01.osl.basefarm.net has no MX records.
Question and response
Question
dig ns01.osl.basefarm.net. MX
Answer
The response has no answer records.
Authority
osl.basefarm.net. 10 SOA ns01.osl.basefarm.net. support.basefarm.com. 2018127352 86400 3600 2419200 10
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0