I had some problems configuring my mail account on the main mailer programs. I discovered that Vista introduced a new feature called “Receive Window Auto-Tuning”. This gave problems to my msn messenger too, causing it to constantly lose its connection, displaying the error code 81000306.

However, this feature simply adjusts the receive windows size in a continuative way, based upon the changing conditions of the network. Some details can be found in this article.

However, to solve the problem reguarding mail, you simply have to access the console with administrator rights and insert this line

netsh interface tcp set global autotuninglevel=disabled

If this can’t solve the problem, return it to normal

netsh interface tcp set global autotuninglevel=normal

With this command, you can view your current status of the TCP global parameters.

netsh interface tcp show global

While for solving the MSN problem, you simply open the console again with admin privileges, and write:

disabling

netsh int tcp set global autotuninglevel=disabled

enabling

netsh int tcp set global autotuninglevel=normal

checking the state

netsh interface tcp show global

That’s all!

Thanks to Giorgio, i would have never sent any mail from Vista if it wasn’t for him and his vast knowledge!

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