Microsoft Knowledge Base

The information in this article applies to:

• The Microsoft Network versions 1.0, 1.05, 1.2, 1.3, 2.0, 2.5

SYMPTOMS

When you send e-mail on MSN, The Microsoft Network, you may receive a non-delivery receipt with the following message:

   No transport provider was available for delivery to this recipient.

CAUSE

This error has four possible causes:

• You do not have The Microsoft Network Online Service in your e-mail profile. To check your profile, double-click Mail And Fax in Control Panel.
• You replied to e-mail that includes an address that is not in the MSN, The Microsoft Network, address book and is not an Internet address. This problem occurs when the sender includes an address that is available on the sender's mail system but not on MSN.
• The service provider is not loaded. To check this, follow these steps:

  1. In Microsoft Exchange, click Services on the Tools menu.

  2. Click The Microsoft Network Online Service.

  3. Click About. You should see the following files in the File Names

        box:
  

         - Mosrxp32.dll
         - Mosabp32.dll
         - Moscfg32.dll
  

• The addressee's mail server is unable to accept the message because the server is down or blocked when the mail message is being distributed.

RESOLUTION

To resolve the problem, use the appropriate method:

• If The Microsoft Network Online Service is not in your profile, double- click Mail And Fax in Control Panel. Click Add and add the service.
• All addresses must either be in the MSN address book or be valid Internet addresses. You cannot send replies to addresses that exist only on the sender's mail system.
• If you do not see three file names when you check the service provider, remove and reinstall Microsoft Exchange and MSN using these steps:

  1. In Control Panel, double-click Add/Remove Programs.

  2. Click the Windows Setup tab.

  3. Click the Microsoft Exchange and MSN check boxes to clear them,

        and then click OK.
  

  4. Restart your computer.

  5. In Control Panel, double-click Add/Remove Programs.

  6. Click the Windows Setup tab.

  7. Click the Microsoft Exchange and MSN check boxes to select them,

        and then click OK.
  

  8. Restart your computer.

• If the receiving mail server was down, send the message again when the server is working properly.