Article ID: 247335 - Last Review: May 14, 2007 - Revision: 5.2

OLEXP: Outlook Express Cannot Connect to Hotmail through Proxy Server

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This article was previously published under Q247335
For information about the differences between Microsoft Outlook Express and Microsoft Outlook e-mail clients, click the following article number to view the article in the Microsoft Knowledge Base:
257824  (http://support.microsoft.com/kb/257824/EN-US/ ) OL2000: Differences Between Outlook and Outlook Express
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SYMPTOMS

When you try to use Microsoft Outlook Express 5.0 to connect to a Hotmail e-mail account, you may receive one or more of the following error messages:
Unable to poll for new mail messages on your HTTP server. Account 'Hotmail', Server 'http://services.msn.com/svcs/hotmail/httpmail.asp', Protocol HTTPMail, Server Response: 'Proxy Authentication Required', Port 0, Secure (SSL): No, Error Number: 0x800CCC37
-Or-
Outlook Express
Your proxy requires you to authenticate. Contact your network administrator for assistance.
-Or-
Outlook Express Clients using an ISA server as a Firewall and Web proxy server may see the following error:
Unable to poll for new messages on your HTTP server. Account: 'Hotmail', server : 'http://services.msn.com/svcs/hotmail/httpmail.asp',Protocol" HTTPMail, Server Response: 'Proxy Authentication Required (The ISA server requires authorization to fulfill the request. Access to the Web Proxy service is denied. )', Port: 0, Secure(SSL): No, Error Number: 0x800CCC37
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CAUSE

This issue can occur if Outlook Express cannot authenticate you using Proxy Server and Access Control is enabled for Web Proxy.
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RESOLUTION

To work around this issue, use one of the following methods:
  1. Disable Access Control for Web Proxy.
  2. Configure Internet Explorer and Outlook Express to not use a Proxy server. Instead, use the Winsock Proxy client.
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
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APPLIES TO
  • Microsoft Outlook Express 5.0
  • Microsoft Outlook Express 5.0
  • Microsoft Outlook Express 5.0
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Keywords: 
kberrmsg kbenv kbnetwork kbprb KB247335
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