NAT.QA.RAVEU.COM has no MX records.
Question and response
Question
dig NAT.QA.RAVEU.COM. MX
Answer
The response has no answer records.
Authority
RAVEU.COM. 3600 SOA dns1.p02.nsone.net. hostmaster.nsone.net. 1647282833 3600 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0