mx.civica.com has no MX records.
Question and response
Question
dig uks.smtp.exch.eit.civica.com. MX
Answer
The response has no answer records.
Authority
eit.civica.com. 300 SOA ns1-05.azure-dns.com. hostmaster.eit.civica.com. 1 3600 300 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0