Hi i want to host multiple domain mail server in single server. sample scanrio is: my customers are website1.com and website2.com and each one has thier mail box mean: person1@website1.com , and person2@website1.com and employee1@website2.com and employee2@website2.com. i found that if i want to use exchange server then i should install two seperate exchange server and if my doamin exceed , i should install another exchange server. and this mean so many exchange server that is impossible. another solution is thati use simple windows POP3 service with conjuction by OWA , but i don't know how i should configue OWA to work with wxisting windows POP3 service and mailboxes. do any one has any idea for configuring OWA to work with windws POP3 service? bu thanks