Yes, 33hz.co.uk can receive emails.
Yes, 33hz.co.uk seems to be a legitimate domain.
A record
35.214.1.65
MX records
alt1.aspmx.l.google.com
64.233.186.27
alt2.aspmx.l.google.com
74.125.193.26
alt3.aspmx.l.google.com
66.102.1.27
alt4.aspmx.l.google.com
172.217.218.26
aspmx.l.google.com
172.217.197.27