Yes, b-aas.nl can receive emails.
Yes, b-aas.nl seems to be a legitimate domain.
A record
None
MX records
alt1.aspmx.l.google.com
172.217.192.27
alt2.aspmx.l.google.com
209.85.202.26
aspmx.l.google.com
173.194.208.27
aspmx2.googlemail.com
172.217.192.26
aspmx3.googlemail.com
209.85.202.26