ns5.1baht.net has no MX records.
Question and response
Question
dig ns5.1baht.net. MX
Answer
The response has no answer records.
Authority
1baht.net. 1800 SOA joan.ns.cloudflare.com. dns.cloudflare.com. 2396058007 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0