2

Maybe someone could explain how to use Telnet to test Virtual SMTP Server on another machine with Windows 2008?

I have tried command below and get unrecognized command error. (The actual server deomain replaced with xxxxx)

Telnet smtp.xxxxx.com 25
220 xxxxx.com Microsoft ESMTP MAIL Service, Version: 7.0.6002.18222 rea
dy at  Tue, 23 Oct 2012 15:57:18 +0300
FROM: [email protected]
500 5.3.3 Unrecognized command
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1 Answer 1

Reset to default
6

Your syntex needs to start with helo dominaname.com. Example below. Make sure to use enter spaces correct and the period at the end.

    telnet xxx.domainname.com 25
    helo domainname.com
    mail from: [email protected] 
    rcpt to:[email protected] 
    data 

    to: [email protected]
    from: [email protected]    
    Subject:This is a test

    Testing

    .

If your lazy just use http://mxtoolbox.com/diagnostic.aspx

Assuming its a external server.

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