Yes, 33insights.co can receive emails.
Yes, 33insights.co seems to be a legitimate domain.
A record
104.156.81.229
MX records
ALT1.ASPMX.L.GOOGLE.COM
64.233.186.27
ALT2.ASPMX.L.GOOGLE.COM
209.85.202.26
ASPMX.L.GOOGLE.COM
172.217.197.26
ASPMX2.GOOGLEMAIL.COM
64.233.186.26
ASPMX3.GOOGLEMAIL.COM
209.85.202.26