Windows 2000 SMTP Service Returns a Protocol Error with Lotus Notes Client and Clear Text Authentication

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Article ID: 274065 - View products that this article applies to.
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When an Exchange 2000 Server using clear text authenticates a Lotus Notes R5 client, the Windows 2000 Simple Mail Transfer Protocol (SMTP) service may return a protocol error.


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 the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The English version of this fix should have the following file attributes or later:
   Date        Time    Version        Size     File name 
   09/27/2000  04:26p  5.0.2195.2345  234,768  Seo.dll 
   09/27/2000  04:30p  5.0.2195.2345  381,200  Smtpsvc.dll 



Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.


For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes


Article ID: 274065 - Last Review: October 21, 2013 - Revision: 3.3
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbfix kbwin2000presp2fix KB274065

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