April 17, 2007
5:41 pm | Last updated: March 2, 2009 at: 3:20 am
Windows Vista: Resolving Outlook 2007 and POP3 Performance Issues
There are some functionality problems associated with the usage of Outlook 2007 on Windows Vista and POP3 accounts. Outlook 2007 users on Windows Vista have complained that the application becomes virtually unusable with POP3 accounts. The issue is limited to Outlook 2007; Outlook 2003 is not affected.
The issue is closely connected to a new feature in Windows Vista, namely TCP Windows Scaling. In the scenario in which a network hardware device, a router for example, does not deliver support for TCP Windows Scaling the users are going to experience the slow download speeds mentioned above.
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I was running into this problem with Outlook 2003 on a Windows 2008 Server. When attempting to download emails from the POP3 server I was unable to use outlook. I couldn't download any email but the status bar showed that the download was occuring but at an unusable pace. Usually it would havg at aroun 10-15K and time out. The same solution, runing "netsh interface tcp set global autotuninglevel=disabled" corrected the problem. Now Oulook 2003 flys. Thanks for the tip.
Thanks for this article. It was driving me nuts -- it fixed the problem.