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    How does one check whether the SMTP server is rejecting emails?

    Issue
    User would like to test SMTP server to send email

    Product Line
    ION Meters with Alert modules
    Software requiring SMTP server to send emails

    Environment
    Command prompt

    Cause
    Sometimes SMTP servers are configured to accept emails only from certain computers and/or user account. 

    Resolution
    Items highlighted below need to be modified to match system

    To test the SMTP service, follow these steps: 
    1) Open Command prompt and type Telnet, and then press ENTER

    2) Type set LocalEcho, press ENTER, and then type open 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
    5) Type rcpt to:youremail@yourdomain.com, and then press ENTER.

    The output resembles the following:
    250 OK - Recipient

    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

    Details on these steps can be found in the link below:
    http://support.microsoft.com/kb/323350

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