How to test SMTP operations using Telnet

[Belinda Frick]

How to test SMTP operations using Telnet

1. Telnet into Exchange server hosting IMS service using TCP port 25.
Command is

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telnet <servername> 25

2. Turn on local echo on your telnet client so that you can see what you are typing.
On Win 9x and NT 3.5/4.0 Telnet client this done by selecting the "preferences" from the "terminal" pull down menu, and checking the local echo radio button. For Windows 2000 telnet client, issue command

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"set local_echo"

, from the telnet command prompt.

3. Issue the following smtp command sequence

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helo <your domain name>

<enter>
response should be as follows
250 OK

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mail from: <your Email Address>

<enter>
response should be as follows
250 OK - mail from <your Email address>

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rcpt to: <recipient address>

<enter>
response should be as follows
250 OK - Recipient <recipient address>

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data

<enter>
response should be as follows
354 Send data. End with CRLF.CRLF

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To: <recipient's display name>

<enter>

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From: <your display name>

<enter>

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Subject: <Subject field of Email message>

<enter>

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<Enter you body text>

<enter><enter> . <enter>
response should be as follows
250 OK

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quit

<enter>