Open a dos windows and type the following:
telnet <host> <port>
<host> would be the host that you wish to connect, your anti-spam IP address.
<port>, testing the SMTP Protocol the default is 25
ex:
telnet antispam.mydomain.com 25 or telnet 192.168.1.100 25
Once connected, type this command:
helo example.com
The response back should be:
250 OK
Then type the command(sender):
mail from: test@example.com
The response back should be:
250 OK – mail from <test@example.com>
Then type the command (recipient):
rcpt to: votre-adresse@your-domain.com
Be sure to get access on this email, to validate that the test has been succesful.
votre-adresse@your-domain.com.
The response back should be:
250 OK – Recipient <toto@your-domain.com>
Then type:
data
The response back should be:
354 Enter mail, end with “.” on a line by itself.
Now, this is the most important entries which your anti-spam would see as spam or not(end with a CRLF.CRLF):
Subject: Spam Delivery Test
X-Advertisement: spam
spam test
.
The response back should be:
250 OK
221 Closing Port / Mail queued for delivery
Then you can type quit to exit telnet
Quit
Depending of your Antispam product and technology behind, the actions done once this message might differ, however this type of value should see/detect this message as spam message.