ricoh.uc-gateway.nl has no MX records.
Question and response
Question
dig ricoh.uc-gateway.nl. MX
Answer
The response has no answer records.
Authority
uc-gateway.nl. 3600 SOA ns.systemec.nl. postmaster.uc-gateway.nl. 2022051301 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0