mail relay

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To: netfilter@xxxxxxxxxxxxxxxxxxx
Subject: mail relay
From: david@xxxxxx
Date: Thu, 20 Mar 2003 16:25:01 +0100
Sender: netfilter-admin@xxxxxxxxxxxxxxxxxxx

Hi everybody,
I would like to know how can I filter the mail relay received in my port 25 with the firewall,.. I want only accept the packets from only one ip, my ISP.
This is possible this rule with iptables ??

Thanks

-NO WAR- and No Aznar

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