--- /tmp/xx/Kolab_Filter-2.2rc120080204/Filter/Content.php	2008-02-04 14:51:45.000000000 +0000
+++ lib/php/Kolab/Filter/Content.php	2008-04-14 22:54:38.976551441 +0000
@@ -34,6 +34,7 @@
 
 /* Load the basic filter definition */
 require_once 'Kolab/Filter/Filter.php';
+require_once('Net/IPv4.php');
 
 define('RM_STATE_READING_HEADER', 1 );
 define('RM_STATE_READING_FROM',   2 );
@@ -390,6 +391,39 @@
     return sprintf($fmt, $sender);
 }
 
+
+
+function permited_host($host){
+
+	global $conf;
+
+	$ldapconn = ldap_connect($conf['filter']['ldap_uri']);
+	if(!$ldapconn)
+		return false;
+
+	if(!ldap_bind($ldapconn, $conf['filter']['bind_dn'], 
+			$conf['filter']['bind_pw']))
+		return false;
+
+	$attrs[0] = "postfix-mynetworks";
+	$result = ldap_search($ldapconn, $conf['filter']['base_dn'],
+			"k=kolab", $attrs);
+	if(!$result)
+		return false;
+
+	$info = ldap_get_entries($ldapconn, $result);
+	if($info['count'] != 1 || !array_key_exists($attrs[0], $info[0]))
+		return false;
+	$addrs = $info[0]['postfix-mynetworks'];
+	foreach($addrs as $addr){
+		if($host == $addr or Net_IPv4::ipInNetwork($host, $addr))
+			return true;
+	}
+
+	return false;
+
+}
+
 /** Check that the From header is not trying
     to impersonate a valid user that is not
     $sasluser. Returns one of:
@@ -438,6 +472,12 @@
         $kolabhosts = 'localhost';
     }
 
+	/*
+	 * Allow Postfix $mynetworks
+	 */
+	if(permited_host($client_addr))
+		return true;
+
     /* Allow anything from localhost and
      * fellow Kolab-hosts 
      */