d.dsinn.com has no MX records.
Question and response
Question
dig d.dsinn.com. MX
Answer
The response has no answer records.
Authority
dsinn.com. 1800 SOA fattouche.ns.cloudflare.com. dns.cloudflare.com. 2396899739 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0