On some networks, Windows Vista may not allow you to download large email messages or file attachments to a POP3 account. Instead, you get a message that the server has timed out.

Until Microsoft releases a patch or fix for this issue, you can disable autotuning.

To Disable Autotuning in Windows Vista:

1. From the Start menu, select All Programs > Accessories.
2. In the Accessories list, right-click on Command Prompt and select Run as Administrator.
3. At the command prompt, type netsh interface tcp set global autotuninglevel=disable and press Enter.
4. When the command prompt returns confirmation of OK, close the command prompt window.

You should now be able to download your email in Windows Vista without issues.