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Getting error message with POP3 Server in IIS 6.0

I'm having trouble with the POP3 Server in IIS 6.0 on a Windows 2003 Server. When I create the client account in Microsoft Outlook and click the "Test Account Settings" button, it finds the SMTP Server (same box) and finds the POP3 Server, but the logon fails with the following error:

"Log onto incoming mail server (POP3): Unable to logon to the incoming mail server (POP3). Please verify the settings in the User Name; Password and E-mail fields."

I've tried both Authentication Methods: Encrypted Password, with Require Secure Password Authentication for all client connections on and off, and Local Windows Accounts method. The box hosts multiple websites and the server is not a member of an Active Directory, it's in a Workgroup.

I'm getting the same error over and over. I've tried at least three different configurations a total of five times, I don't think it's a typo in one of the fields listed in the error message. Can you provide any suggestions or help?

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If you are using clear text authentication, be sure to state the username in the format "". If you are using Secure Password Authentication, just use "username" without the @ sign or the domain name. If that doesn't fix the problem, open the POP3 Service console, view the computer's properties, and set the Logging Level to Maximum. Then, check Event Viewer (application log) to identify the cause of the authentication problem. Good luck.

This was first published in January 2004

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