[Exim] receiver_verify

I'd like to reject mail for an address which is not in the alias file,
easy if it's a local acct, but it doesn't seem to work for this set up:

# specifying receiver_verify doesn't work:
receiver_verify
receiver_verify_addresses = domain.com

local_domains = domain.com

# director (placed after aliasfile director):
hub_domain:
driver = smartuser
transport = trans_domain
domains = domain.com

# transport:
trans_domain:
driver = smtp
hosts = some.other.mail.server