1. Telnet into Exchange server TCP port 25.
Command is telnet <servername> 25
OR
telnet <servername> smtp
2. Issue the following smtp command sequence
helo <your domain name><enter>
response should be as follows
250 OK
mail from: <your Email Address><enter>
response should be as follows
250 OK - mail from <your Email address>
rcpt to: <recipient address><enter>
response should be as follows
250 OK - Recipient <recipient address>
data<enter>
response should be as follows
354 Send data. End with CRLF.CRLF
To: <recipient's display name><enter>
From: <your display name><enter>
Subject: <Subject field of Email message><enter>
<Enter you body text>press ENTER, type a period (.), and then press ENTER again.
response should be as follows
250 OK
If mail is working properly, you should see a response similar to the following indicating that mail is queued for delivery:
quit<enter>