Server :: Postfix Configuration: How To Restrict Use Of CC

Jan 17, 2011

I have configured postfix on my server.

telnet mydomain.com 25
helo validdomain.com
mail from: validaddress@validdomain.com
rcpt to: validuser@mydomain.com

[code]....

When I run this test, as expected, the email is delivered to validuser. However, postfix also delivers it to user1 and user2 despite the fact that the sender does not belong to my domain. I have implemented client, helo and recipient restrictions as below. How do I prevent the malicious use of CC as described here?

Snap of main.cf
-------------------
smtpd_client_restrictions = permit_mynetworks,
reject_invalid_hostname,
reject_rbl_client zen.spamhaus.org,
reject_unknown_client,

[code].....

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