SBS 2003 / Exchange not routing emails as expected

We have recently installed Small Business Server 2003. The problem I am having is that Exchange is not routing emails to the user accounts as I would expect. We are retrieving our email from a POP3 account. If there is a match on the "Display Name", then the email is getting to the correct mailbox. Otherwise they are being dumped into the "Underlivered POP3 Mail" Exchange mailbox.

I have set up user accounts for all expected users/mail boxes and created ailiases for them, but this hasn't helped.

For example, email sent to (say) info@company.com is not being routed to the Info mail box unless the email comes in with a display name matching the account name. That is, if I send an email to info@company.com it ends up in the "undelivered" mailbox. If I reply to an email sent from info@company.com, then it ends up in the Info mailbox.

What have I missed? Why is Exchange not directing emails to mail boxes based on the email address and and Aliases set up for the account?

Thanks in advance, Sumsol.
sumsolAsked:
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sumsolAuthor Commented:
Thanks for the links. These helped, but did not specifically solve the problem. Tracked down the cause to an incorrect setting in the pop3 configuration - the Email domain had been set to company.local and not company.com
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