It's Taking Longer Time To Download Email From Pop3 Server In Outlook 2007

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You must have encountered a situation in which you try to download an email message from a POP3 server in Microsoft Office Outlook 2007; and it takes much longer time to download than expected. For example, when you download a 1-megabyte (MB) message, the download process may take as long as one hour.

In addition to this, when you send email messages by using the SMTP server of an Internet service provider (ISP), the connection may time out. When this problem occurs, you usually receive the following error message:
Task 'Main - Sending and Receiving' reported error (0x800CCC0F): 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'
Reason behind this problem
This problem occurs if a network hardware device, such as a router, does not support TCP Window Scaling. TCP Window Scaling is a new Windows Vista feature.

Resolving it manually
Before going for any external technical help, it's better to resolve the issue by fixing it manually. So to determine whether this problem is caused by a network hardware ...
... device that does not support TCP Window Scaling, you must follow the given below steps accordingly.
Click Start.

Collapse this imageExpandClick All Programs, and then click Accessories.
Right-click Command Prompt, and then click Run as Administrator.Collapse this imageExpand this image
If you are prompted for an administrator password or for confirmation, type the password, or click Continue.

At the command prompt, type the following command, and then press ENTER:
netsh interface tcp set global autotuninglevel=disabled
Close the Command Prompt window.
After that restart the computer.
Start Outlook.

If the problem is fixed, you can either keep the value for the autoTuningLevel parameter as disabled or isolate the hardware that does not support TCP Window Scaling. You can also set the autoTuningLevel parameter to other values.

Sometime in this hullabaloo, Outlook PST file gets corrupt and you are not able to access Outlook file at all. Incomplete downloading of emails make them corrupt and due to these immature email files Outlook mailbox gets corrupt or inaccessible.

At that point of time, you are supposed to take help of third party applications that are efficient enough to resolve any kind of corruption issue in Outlook file and fix Outlook instantly. Software to fix outlook files recovers and restores emails and other related stuff from damaged or corrupted PST files. You can easily recover deleted emails, recover emails from corrupt or broken PST file corrupted due to 2 GB limitation of Microsoft Outlook or damaged headers. Nowadays, software comes with free demo so that user can have complete satisfaction before actually spending penny.