ns1.flametree.com has no MX records.
Question and response
Question
dig ns1.flametree.com. MX
Answer
The response has no answer records.
Authority
flametree.com. 21600 SOA ns1.outserv.net. dns-admin.outserv.net. 2024080903 21600 3600 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0