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Microsoft KB Archive/170694

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Knowledge Base

Article ID: 170694

Article Last Modified on 1/20/2007


  • Microsoft Outlook 97 Standard Edition
  • Microsoft Exchange Client 5.5
  • Microsoft Exchange Client 5.0

This article was previously published under Q170694


When sending a message to an Internet e-mail address with the CompuServe Mail transport, you may receive an undeliverable message from the "System Administrator." The body of the undeliverable message states, "No transport provider was available for delivery to this recipient."


Outlook does not understand the CompuServe notation for Internet e-mail addresses, ( if you manually type the address into the "To" field of the message. Consequently, Outlook incorrectly interprets the address as an SMTP address. This causes Outlook to look for an SMTP capable transport service, such as the Internet Mail transport service, instead of the CompuServe Mail transport service.


There are two methods of sending e-mail when using the CompuServe addressing scheme.

Method 1

Add the e-mail address to the CompuServe Address Book. After you add the address to the CompuServe Address Book, you can use the address from your CompuServe Address Book to send through the CompuServe Mail transport service. For more information on configuring the CompuServe Address Book, contact CompuServe.

Method 2

Follow these steps to set the address type to CompuServe mail, without using the CompuServe Address Book:

  1. Type the address in the "TO:" field as
  2. On the Untitled Message toolbar, click Check Names to resolve the address (the address becomes underlined).
  3. Using your right mouse button, click the address and from the context-sensitive menu, click Properties.
  4. In the e-mail type, click to change SMTP to COMPUSERVE.
  5. Click OK and then send the message.


For more information on CompuServe Mail and Outlook, see the following article in the Microsoft Knowledge Base:

143051 How to install and Use CompuServe Mail with MS Exchange

The CompuServe transport service is manufactured by CompuServe, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

Keywords: kb3rdparty kbhowto KB170694