Article ID: 839496
Article Last Modified on 10/30/2006
APPLIES TO
- Microsoft Small Business Server 2000 Standard Edition
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:
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:
- Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
- In the tree view pane, expand Servers, and then expand the
Server name. - Expand Protocols, and then expand SMTP.
- Click Default SMTP Virtual Server, and then click Stop on the Action menu.
- Right-click Default SMTP Virtual Server, and then click Properties.
- Click the Access tab, and then click Connection.
- Click All except the list below, and then click OK two times.
- On the Action menu, click Start.
REFERENCES
For additional information about diagnostic logging for the POP3 connector, click the following article number to view the article in the Microsoft Knowledge Base:
279985 SBS POP3 connector does not report actual POP3 server errors
For additional information about how to telnet to port 25, click the following article number to view the article in the Microsoft Knowledge Base:
153119 Telnet to port 25 to test SMTP communication
Additional query words: SBS 2000 SBS2k pop3 connector mailboxes
Keywords: kbprb KB839496
