exchange mailbox may have multiple smtp addresses. for outgoing messages exchange server always uses the primary smtp address. for example, john doe has a mailbox with john.doe@companya.com primary smtp address and john.doe@companyb.com secondary smtp address. john doe can easily receive the message addressed both to john.doe@companya.com and john.doe@companyb.com, but he can not send the message as john.doe@companyb.com because this behaviour is by design in exchange server. choosefrom for exchange 2000/2003 application allows users to send a message with any of their own smtp addresses as the from address. features: * you do not need to create an additional "fake" mailbox or contact specifically for storing an additional from address. * the application is server-centric, so you do not need to install any extra software on the client side.