domains = +virtual_domains
file_transport = ${if eq {${extract{group_writable}{VDOMAINDATA}}}{true}{address_file_group}{address_file}}
cannot_route_message = Unknown user
domains = +virtual_domains
file_transport = ${if eq {${extract{group_writable}{VDOMAINDATA}}}{true}{address_file_group}{address_file}}
cannot_route_message = Unknown user