136.239.113.131.static.cspire.com has no MX records.
Question and response
Question
dig 136.239.113.131.static.cspire.com. MX
Answer
The response has no answer records.
Authority
cspire.com. 1800 SOA alexia.ns.cloudflare.com. dns.cloudflare.com. 2397197288 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0