newsletters.bookmyshow.com has no MX records.
Question and response
Question
dig newsletters.bookmyshow.com. MX
Answer
The response has no answer records.
Authority
bookmyshow.com. 1800 SOA coby.ns.cloudflare.com. dns.cloudflare.com. 2398019490 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0