Yes, 310.net can receive emails.
Yes, 310.net seems to be a legitimate domain.
A record
208.80.182.203
MX records
mx10.triple8.net
154.61.81.58
mx20.triple8.net
95.216.36.252
mx30.triple8.net
95.211.121.203
mx40.triple8.net
209.58.136.65