First let me explain how the server is set up for email:
We use a 3rd party host for our email
Our server is SBS 2008 with exchange 2007 built in
We use the built in POP3 connector on the SBS server to collect the mail from the 3rd party
From there Exchange distributes the email to the proper user.
The mx records are pointed at the 3rd party email host.
Currently I have the iPhone set up to receive email via pop through the 3rd party host, but there are some problems with this.
1. the user doesn't receive all external email, I think the SBS pop connector is picking up the mail before the iphone does.
2. The user doesn't receive internal email (because exchange is handling this directly)
So can I set up the iphone to recieve exchange email (perhaps using the external static ip address of the sbs server and not the mail.domain.com address for the server name)
If I can do this do I need to open any ports on the firewall, if so what ports do I need?