I have Small business server 2000, using Exchange Server 2000 SP3. The
Exchange server syncronises email with our ISP's POP3 email account. Then i
have set individual "Mail Listings" in the POP3 Connector to direct email to
the relevant exchange users (muliple exchange emails being used with one POP3
email account). I have had a number of people say that they have not received
emails that they know have been sent.

I have check all spam and junk mail filters.
Checked that the ISP POP3 account are receiving the emails first.
None of the people sending emails are getting any NDR back.

They are getting collected by the Exchange server but where are they going?
Is there a setting where i can set all of the non-routable emails to go to a
certain directory or mailbox (i.e administrator)?
This email system has been working fine in the past  but there are a number
of emails going missing.

Thanks