www.bos.getrave.com has no MX records.
Question and response
Question
dig www.bos.getrave.com. MX
Answer
The response has no answer records.
Authority
getrave.com. 3600 SOA dns1.p07.nsone.net. hostmaster.nsone.net. 1647776671 3600 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0