Microsoft KB Archive/165186

= XFOR: Verifying Basic POP3 Connectivity Using Telnet =

Article ID: 165186

Article Last Modified on 2/26/2007

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APPLIES TO


 * Microsoft Exchange Server 5.0 Standard Edition
 * Microsoft Exchange Server 5.5 Standard Edition
 * Microsoft Exchange 2000 Server Standard Edition

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This article was previously published under Q165186



SUMMARY
This article describes how to telnet to port 110 on servers that are running Exchange Server versions 5.0 and 5.5 and Exchange 2000 Server. This procedure is useful for troubleshooting communication problems between a POP3 client and a mailbox located on an Exchange Server or Exchange 2000 Server computer.



MORE INFORMATION
Perform the following steps to ensure that you have proper POP3 connectivity to a mailbox that is located on an Exchange Server or Exchange 2000 Server computer.

NOTE: Press the ENTER key after you type each line.  Start a telnet session by running the following command:

Telnet  110

If a connection is made, a banner from the server is displayed that indicates the server's version, which is similar to the following:

+OK Microsoft Exchange 2000 POP3 server version 6.0.4408.0 ( . .com) ready.

 Begin communication by logging on to the mailbox with the following commands:

USER / /

The following response is displayed:

+OK

 Type the following command:

PASS

The following response is displayed:

+OK User successfully logged on

 Type the following command to list all mail in the mailbox:

LIST

The following response is displayed (this information varies, depending on the number of messages in the mailbox):

+OK

1 373

2 388

3 388

The message number is the number on left Type the following command to retrieve a message:

RETR

The message that you selected by using the message number is displayed in the response, similar to the following:

+OK

Received: by YOMAN2.dns.microsoft.com

id <01BC2F60.EA72A8C0@YOMAN2.dns.microsoft.com>; Thu, 13 Mar

1997 03:44:55 -0000

Message-ID:



From: yoman2 

To: yoman2 

Subject: test2

Date: Thu, 13 Mar 1997 03:44:55 -0000

X-Priority: 3

MIME-Version: 1.0

Content-Type: text/plain

<Body of Message>

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If you are able to complete the preceding steps without error, any POP3 client that conforms to Request for Comments (RFC) 1939 should work to connect to the mailbox.

Keywords: kbtshoot KB165186

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