0x80040900

The server name you entered can not be found on the network (it might be down temporarily).

SYMPTOMS

When you try to send and receive e-mail, you may receive an error message that is similar to one of the following:

0x80040900 The server name you entered can not be found on the network (it might be down temporarily). Please verify that you are online and that the server name is correct.

CAUSE

This error message may occur if Microsoft Outlook or if Microsoft Outlook Express cannot establish a connection with your e-mail server. This error message is frequently caused by one of the following:

• You are not connected to the Internet or a network
• Incorrect account settings
• Your user profile in Outlook is damaged
• An e-mail item on your POP3 server is damaged
• Incorrect configuration of your AV software
• Outlook Express has been removed from the computer or the installation is damaged
• Incorrect configuration of personal firewall software

RESOLUTION

The most common causes of these error messages are problems with Internet connectivity and incorrectly configured account settings in Outlook or Outlook Express. First, verify you are connected to the Internet. To do this, follow these steps:

Step 1: Verify that you are connected to the Internet
To verify Internet connectivity, follow these steps:

1. Start an Internet browser, such as Internet Explorer
2. Type one of the following addresses in the address bar

• http://www.google.com
• http://www.msn.com
• http://www.yahoo.com

If you can successfully connect to the Internet, the next step is to verify your e-mail account settings in Outlook or Outlook Express.

Step 2: Verify your account settings
To verify your e-mail account information and e-mail server settings are configured correctly in Outlook or Outlook Express, we recommend that you contact your E-mail service provider (which may also be your Internet Service provider).

See also: Microsoft Technical Support - 0x80040900