mailgate.thehydrogenoffice.com has no MX records.
Question and response
Question
dig mailgate.thehydrogenoffice.com. MX
Answer
The response has no answer records.
Authority
thehydrogenoffice.com. 3600 SOA ns1.livedns.co.uk. administrator.thehydrogenoffice.com. 1523873637 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0