sh01.workplaceproemail.com has no MX records.
Question and response
Question
dig sh01.workplaceproemail.com. MX
Answer
The response has no answer records.
Authority
workplaceproemail.com. 1800 SOA amanda.ns.cloudflare.com. dns.cloudflare.com. 2396106061 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0