redirects.domainname.systems has no MX records.
Question and response
Question
dig redirects.domainname.systems. MX
Answer
The response has no answer records.
Authority
domainname.systems. 1800 SOA gene.ns.cloudflare.com. dns.cloudflare.com. 2395524194 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0