A client has Exchange server 5.5 and 10 users internally
attaching to it. Now they want to setup remote users of
this company to retrieve their mail using Outlook client.
Is there a way to get the remote users to use their
Outlook clients to send email to a Exchange server and not
allow anyone else outside the company (possible
spammers)? Is the best way jsut to use a VPN with a
firewall (which they have), but didn't know what
performance issues this may cause or force them to use OWA?