Q174245: Err Msg: An Unknown Error Has Occurred: 501 Invalid Address

Article: Q174245
Product(s): The Microsoft Network
Version(s): WINDOWS:1.0,2.5
Operating System(s): 
Keyword(s): kbenv kberrmsg kbtlc kbmsn
Last Modified: 08-OCT-1999

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The information in this article applies to:

- The Microsoft Network version 2.5 
- Microsoft Internet Mail and News version 1.0 for Windows 95 
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SYMPTOMS
========

When you try to send or receive e-mail using Internet Mail, you may receive the
following error message:

- 

  An Unknown error has occurred: 501 Invalid Address

CAUSE
=====

This behavior may occur for any of the following reasons:

- The e-mail address specified in your Internet Mail settings may not be
  correct.

- The Microsoft Client for Microsoft Networks may not be installed.

- Your computer's network name may not conform to the naming conventions.

RESOLUTION
==========

To resolve this issue, use the following steps:

1. Start Internet Mail, and then click Options on the Mail menu.

2. Click the Server tab, and then type your correct e-mail address in the Email
  Address box. Note that the e-mail address must not contain any spaces.

3. Click OK, and then click Outbox in the Folders box.

4. Delete any e-mail in your Outbox by right-clicking a message, and then
  clicking Delete. Repeat this step until all messages are removed.

5. Quit Internet Mail.

6. Test to determine if the issue is resolved by starting Internet Mail and
  trying to send or receive e-mail. If the issue is resolved, skip the
  remaining steps. If the issue is not resolved, click Outbox in the Folders
  box, right-click a message, and then click Delete. When all of the e-mail in
  the Outbox is deleted, quit Internet Mail.

7. Click Start, point to Settings, click Control Panel, and then double- click
  Network.

8. On the Configuration tab, verify that Client For Microsoft Networks is listed
  in the "The following network components are installed" box. If Client for
  Microsoft Networks does not appear, add the Microsoft Client for Microsoft
  Networks by using the following steps:
  a. Click Add, click Client, and then click Add.

  b. In the Manufacturers box, click Microsoft.

  c. In the Network Clients box, click Client for Microsoft Networks, and then
     click OK.

9. Click the Identification tab.

10. Change the computer name so that it consists only of any combination of
  letters (A-Z) and numerals (0-9). Do not use non-alphanumeric characters or
  blank spaces in the computer name.

11. Click OK. When you are prompted to restart the computer, click Yes.

Additional query words: 1.00 msnet msnetwork microsoft-net m.s.n.

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Keywords          : kbenv kberrmsg kbtlc kbmsn 
Technology        : kbMSNSearch kbIMNSearch kbMSN250 kbIMN100Win95
Version           : WINDOWS:1.0,2.5
Issue type        : kbprb

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