Yes, 0.pn can receive emails.
Yes, 0.pn seems to be a legitimate domain.
A record
None
MX records
ALT1.ASPMX.L.GOOGLE.COM
64.233.186.27
ALT2.ASPMX.L.GOOGLE.COM
209.85.202.26
ASPMX.L.GOOGLE.COM
173.194.204.26
ASPMX2.GOOGLEMAIL.COM
64.233.186.27
ASPMX3.GOOGLEMAIL.COM
209.85.203.26
ASPMX4.GOOGLEMAIL.COM
74.125.206.27
ASPMX5.GOOGLEMAIL.COM
173.194.69.26