Yes, 8.se can receive emails.
Yes, 8.se seems to be a legitimate domain.
A record
198.185.159.144
MX records
alt1.aspmx.l.google.com
64.233.186.27
alt2.aspmx.l.google.com
209.85.202.26
alt3.aspmx.l.google.com
74.125.71.26
alt4.aspmx.l.google.com
74.125.128.26
aspmx.l.google.com
172.217.197.26