I am the administrator for a group of users. The network consists of several Windows XP systems and a server running Windows 2000 Small Business Server. They use Exchange on the server primarily for shared calendars, although they do use Exchange to store their e-mail on the server. For e-mail, they utilize an external Internet service provider for POP3 e-mail boxes.
Everything works fine except for one user (we'll call her firstname.lastname@example.org) who works remotely and does not have access to the network. At first, this user did not have an Exchange account, but she did have a POP3 account at their POP3 mail server (I'll call it "mail.group.org") to check her e-mail. The first problem occurred when users within the network tried to send her e-mail. The Exchange server rejected their e-mails with the following message:
The following recipient(s) could not be reached:
The e-mail address could not be found. Perhaps the recipient moved to a different e-mail organization, or there was a mistake in the address. Check the address and try again.
This occurs because the user doesn't have an Exchange account, but she does have an external POP3 account, and it looks like Exchange won't let the mail go out to the POP3 server if it can't find an Exchange mailbox on the server. My question is, how do I fix this? I've tried adding an Exchange mailbox for the user and I get a different problem, which is that Exchange grabs all the mail sent internally to her on the network (rather than utilizing the external POP3 server), and, because she doesn't have access to the network remotely she can't check her Exchange mailbox (we don't have VPN set up at this point). Any help with this would be most greatly appreciated.