Yes, 512pixels.net can receive emails.
Yes, 512pixels.net seems to be a legitimate domain.
A record
45.79.58.105
MX records
ALT1.ASPMX.L.GOOGLE.COM
64.233.186.27
ALT2.ASPMX.L.GOOGLE.COM
209.85.202.27
ASPMX.L.GOOGLE.COM
173.194.206.26
ASPMX2.GOOGLEMAIL.COM
64.233.186.26
ASPMX3.GOOGLEMAIL.COM
209.85.202.27