Microsoft KB Archive/839496

= E-mail messages are not delivered to their recipients when you use the SBS POP3 connector =

Article ID: 839496

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Small Business Server 2000 Standard Edition

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SYMPTOMS
When you use the Microsoft Small Business Server (SBS) Post Office Protocol version 3 (POP3) connector to download e-mail messages from an Internet service provider (ISP), the messages may be successfully downloaded from the POP server, but the messages are not delivered to their recipients. No errors are logged in the application log.

When you set diagnostic logging for the POP3 connector delivery service to the maximum level, you see the following event in Event Viewer:

Event ID: 4032

Source: POP3 Connector

Category: Delivery

Description: A recipient has been processed.

Recipient information:

NDR Status Code: 400

Error Code: 00000000

SMTP Reply:

SMTP Name: user@domain.com

SMTP Host: server.domain.com

When you telnet to port 25 on the server to test the Simple Mail Transfer Protocol (SMTP) communication, you receive an error message that is similar to the following:

Connection to host lost



CAUSE
This problem occurs if the Only the list below option is selected in the connection control properties of the default SMTP virtual server, but the list of computers that can access the virtual server is blank.



RESOLUTION
To resolve this problem, follow these steps:
 * 1) Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
 * 2) In the tree view pane, expand Servers, and then expand the.
 * 3) Expand Protocols, and then expand SMTP.
 * 4) Click Default SMTP Virtual Server, and then click Stop on the Action menu.
 * 5) Right-click Default SMTP Virtual Server, and then click Properties.
 * 6) Click the Access tab, and then click Connection.
 * 7) Click All except the list below, and then click OK two times.
 * 8) On the Action menu, click Start.

