Skip navigation

JSI Tip 1532. W95 Microsoft Exchange client runs very slowly when Proxy server is installed.

This W95 client makes a Winsock call, even if TCP/IP is not used on the client computer. Thus, the Proxy server requests a DNS name lookup, which may require a dial up to the internet.

On the Proxy server, in the client directory, modify the global Mspclnt.ini file by adding the following sections:

For Microsoft Exchange, add:


For the Outlook client, add:


Optionally, for the MAPI spooler, add:


NOTE: Refresh the Winsock Proxy Files on the client as the normal refresh interval is 6 hours.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.