mx.purecarenet.com has no MX records.
Question and response
Question
dig digitalfortshield.com. MX
Answer
The response has no answer records.
Authority
digitalfortshield.com. 1800 SOA carla.ns.cloudflare.com. dns.cloudflare.com. 2398212935 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0