bt has no MX records.
Question and response
Question
dig bt. MX
Answer
The response has no answer records.
Authority
bt. 3600 SOA ns1.druknet.bt. hostmaster.druknet.bt. 2026030208 3600 900 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0