s0.bry.do has no MX records.
Question and response
Question
dig s0.bry.do. MX
Answer
The response has no answer records.
Authority
bry.do. 1755 SOA elmo.ns.cloudflare.com. dns.cloudflare.com. 2394326809 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0