This article was previously published under Q254795
This article has been archived. It is offered "as is" and will no longer be updated.
If a time-out occurs on an Exchange Server 5.5 computer when you send or post by using Simple Mail Transfer Protocol (SMTP) or Network News Transfer Protocol (NNTP), the Collaboration Data Objects (CDO) for Windows 2000 (CDOSYS) may stop responding. This may occur if the remote server is under a very heavy load or if the server or network is unavailable.
This problem can occur if Exchange Server does not close the connection to the remote server correctly.
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5.
This problem was first corrected in Windows 2000 Service Pack 1.