nsb.bookmyname.com has no MX records.
Question and response
Question
dig nsb.bookmyname.com. MX
Answer
The response has no answer records.
Authority
bookmyname.com. 3600 SOA nsa.scaleway.com. hostmaster.bookmyname.com. 2026022601 3600 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0