Test the SMTP Service

From http://support.microsoft.com/kb/323350...

To test the SMTP service, follow these steps:

  1. On a computer running Windows Server 2003, type Telnet at a command prompt, and then press ENTER.
  2. At the telnet prompt, type set LocalEcho, press ENTER, and then type open <machinename> 25, and then press ENTER.The output resembles the following:
    220 computername.microsoft.com ESMTP Server (Microsoft Exchange Internet Mail Service 5.5.2651.58) ready
    
  3. Type helo me, and then press ENTER.The output resembles the following:
    250 OK
    
  4. Type mail from:email@domain.com, and then press ENTER.The output resembles the following:
    250 OK - mail from <email@domain.com>
    
  5. Type rcpt to:youremail@yourdomain.com, and then press ENTER.The output resembles the following:
    250 OK - Recipient <youremail@yourdomain.com>
    
  6. Type Data, and then press ENTER.The output resembles the following:
    354 Send data.  End with CRLF.CRLF
    
  7. Type Subject:This is a test, and then press ENTER two times.
  8. Type Testing, and then press ENTER.
  9. Press ENTER, type a period (.), and then press ENTER.The output resembles the following:
    250 OK
    
  10. Type quit, and then press ENTER.

    The output resembles the following:

    221 Closing Port / Mail queued for delivery