there is another solution......
After I put my PPC on the cradle to synchronize, I go directly to Inbox, then I choose the Pop3 folder. Tap the Service menu bar, and choose "Disconnect" from the menu.
After this task is performed, you can check your Mail in the Outlook without any problem.
The Activesync will run at the background, but the passthrough connection to the Inbox is temporarily disconnected. When you want to check the Pop3 mail on your PPC, just select "Connect".
This way, you don't have to change any setup for the PPC Inbox.
Andreas