Yes, 30014.org can receive emails.
Yes, 30014.org seems to be a legitimate domain.
A record
162.255.119.248
MX records
alt1.aspmx.l.google.com
64.233.186.27
alt2.aspmx.l.google.com
209.85.202.26
aspmx.l.google.com
173.194.68.26
aspmx2.googlemail.com
64.233.186.27
aspmx3.googlemail.com
209.85.202.27