Question : multiple email domains and sender selection

I have an SBS 2003 server with 2 email domains. The extra email domain is correctly installed and all email functions work, but I have one issue where the user selects which email address she is sending From, but Outlook 2003 simply takes no heed and sends it from the default address anyway.

Anyone know why?

Answer : multiple email domains and sender selection

Exchange uses the primary email address as the outbound from address, and you can only have one primary email address per account.

I beleive the only way around this is to setup another mailbox with the other address as primary and set it up as an additional account using POP/SMTP in the users mailbox. Like you would if you setup your personal internet email in your mail profile. Then you can select a different from account.