SMTP mail extraction

Hello Everyone.

I am quite new to the exchange world, and so am not even sure whether
the subject is a correct representation for what I am trying to do:

We are having our internet mail hosted on an outside server, and using
Exchange 2003 as the mail transport system within the office. Every
outlook client has two email accounts configed, one for the local
exchange server and another for the external SMTP/POP3 service. Our
internet connection is over ADSL, with a static IP. What we wish to do
is to have our Exchange server automatically extract the messages from
the external POP3 server and deliver them to our mailboxes internally.
We also want the messages to be left on the service provider's machines
in order to be able to access them over internet when necessary. Is
such a configuration possible?

I believe a more correct solution would be to have our exchange server
handle all mail operations and not keep anything on the service
provider, using OWA for web access to our own server. However our
internet connection is not reliable enough to allow that, and we fear
that this would require complex firewall configurations and similar
stuff. Actually I tried to configure this using the internet mail
wizard, but some addresses would refuse messages because we do not have
a reverse lookup record.

Any pointers are deeply appreciated.
Best,
-arifi

.

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