diff --git a/minifirewall b/minifirewall
index 94260a9..4780ab5 100755
--- a/minifirewall
+++ b/minifirewall
@@ -262,14 +262,14 @@ for x in $SSHOK
 # SMTP authorizations
 for x in $SMTPOK
     do
-        $IPT -A INPUT -p tcp ! --syn --sport 25 --dport $PORTSUSER -j ACCEPT
+        $IPT -A INPUT -p tcp ! --syn --sport 25 --dport $PORTSUSER -s $x -j ACCEPT
     done
 
 # secure SMTP (TCP/465 et TCP/587) authorizations
 for x in $SMTPSECUREOK
     do
-        $IPT -A INPUT -p tcp ! --syn --sport 465 --dport $PORTSUSER -j ACCEPT
-        $IPT -A INPUT -p tcp ! --syn --sport 587 --dport $PORTSUSER -j ACCEPT
+        $IPT -A INPUT -p tcp ! --syn --sport 465 --dport $PORTSUSER -s $x -j ACCEPT
+        $IPT -A INPUT -p tcp ! --syn --sport 587 --dport $PORTSUSER -s $x -j ACCEPT
     done
 
 # NTP authorizations