outlook não responde passando pelo squid

Senhore e senhores da nossa comunidade open source....
montei um server squid autenticado para um cliente e estou com um problema que e
fazer o outlook baixar os email pelo pop3 e smtp..
não sei mais o que fazer...
Por favor ajuden...
abaixo script firewall



# Interfaces de Rede

ETHINT='eth1'
ETHEXT='eth2'
REDINT='10.0.0.0/255.0.0.0'

case "$1" in
start)
gprintf "Iniciando o serviço de %s: " "IPtables"
echo
echo 1 > /proc/sys/net/ipv4/ip_forward

### Nega trafego entrada, saida e forward ###
/sbin/iptables -t filter -P INPUT DROP
/sbin/iptables -t filter -P OUTPUT DROP
/sbin/iptables -t filter -P FORWARD DROP


### Nega portas eth externa ###
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p TCP --dport 111 -j DROP
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p TCP --dport 631 -j DROP
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p TCP --dport 953 -j DROP
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p TCP --dport 3128 -j DROP
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p TCP --dport 10000 -j DROP

/sbin/iptables -t filter -A INPUT -i $ETHEXT -p UDP --dport 111 -j DROP
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p UDP --dport 631 -j DROP
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p UDP --dport 953 -j DROP
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p UDP --dport 10000 -j DROP

### Aceita entrada interface lo ###
/sbin/iptables -t filter -A INPUT -i lo -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o lo -j ACCEPT

### Aceita entrada ssh ###
### Descomente a linha abaixo para negar ###
#/usr/sbin/iptables -t filter -A INPUT -i $ETHEXT -p TCP --dport 22 -j DROP
### Descomente a linha abaixo para liberar ssh ###
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p TCP --dport 22 -j ACCEPT
/sbin/iptables -t filter -A INPUT -i $ETHINT -p TCP --dport 22 -j ACCEPT
### Aceita entrada DNS ###
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p UDP --dport 53 -j ACCEPT

### Libera trafego ping rede externa ###
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p icmp --icmp-type echo-request -j ACCEPT
/sbin/iptables -t filter -A INPUT -i $ETHEXT -p icmp --icmp-type echo-reply -j ACCEPT
/sbin/iptables -t filter -A INPUT -i $ETHINT -p icmp --icmp-type echo-request -j ACCEPT
/sbin/iptables -t filter -A INPUT -i $ETHINT -p icmp --icmp-type echo-reply -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p icmp -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHINT -p icmp -j ACCEPT

### Libera trafego ping rede interna ###
/sbin/iptables -t filter -A INPUT -i $ETHINT -p icmp --icmp-type echo-request -j ACCEPT
/sbin/iptables -t filter -A INPUT -i $ETHINT -p icmp --icmp-type echo-reply -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHINT -p icmp -j ACCEPT

### Regra de redirecionamento de porta 80/443 p/ 3128 (proxy) ###
/sbin/iptables -t filter -A INPUT -i $ETHINT -s $REDINT -p TCP --dport 3128 -j ACCEPT
/sbin/iptables -t nat -A PREROUTING -i $ETHINT -s $REDINT -p TCP --dport 80 -j REDIRECT --to-port 3128

###Entrada Pop3###
iptables -A FORWARD -p tcp --dport 25 -j ACCEPT
iptables -A FORWARD -p tcp --dport 110 -j ACCEPT


### DHCP ###
/sbin/iptables -t filter -A INPUT -i $ETHINT -s $REDINT -p TCP --dport 67 -j ACCEPT
/sbin/iptables -t filter -A INPUT -i $ETHINT -s $REDINT -p UDP --dport 67 -j ACCEPT

### Navegação Pagina ###
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p TCP --dport 80 -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p TCP --dport 443 -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p TCP --dport 21 -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p TCP --dport 20 -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p TCP --dport 8080 -j ACCEPT

### FTP UNICAMP PARA ATUALIZAÇÃO ###
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p TCP -d 143.106.10.150 --dport 21 -j ACCEPT
/sbin/iptables -t filter -A OUTPUT -o $ETHEXT -p TCP -d 143.106.10.150 --dport 1024:65535 -j ACCEPT

### Libera conexao entrada de conexões estabelecidas rede externa ###
## Entrada DNS ##
/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -i $ETHEXT -p UDP --dport 53 -j ACCEPT

## Portas Altas TCP e UDP ##
/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -i $ETHEXT -p TCP --dport 1024:65535 -j ACCEPT
/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -i $ETHEXT -p UDP --dport 1024:65535 -j ACCEPT
/sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -o $ETHEXT -p UDP --dport 1024:65535 -j ACCEPT
/sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -o $ETHEXT -p TCP --dport 1024:65535 -j ACCEPT

### Libera conexao de entrada de conexões estabelecidas rede interna ###
/sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -o $ETHINT -j ACCEPT

;;

stop)
gprintf "Parando o serviço de %s: " " IPtables"
echo
/sbin/iptables -F
/sbin/iptables -t nat -F
/sbin/iptables -t filter -P INPUT ACCEPT
/sbin/iptables -t filter -P OUTPUT ACCEPT
/sbin/iptables -t filter -P FORWARD ACCEPT

;;
*)
gprintf "Uso: iptables (start|stop)"
echo
;;
esac

exit 0

echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Caro Antoniaze,

### Regra de redirecionamento de porta 80/443 p/ 3128 (proxy) ###
/sbin/iptables -t filter -A INPUT -i $ETHINT -s $REDINT -p TCP --dport 3128 -j ACCEPT
/sbin/iptables -t nat -A PREROUTING -i $ETHINT -s $REDINT -p TCP --dport 80 -j REDIRECT --to-port 3128

Isto nao estaria correto, pois o SQUID nao tem suporte (se nao me engano) a este protocolo(SMTP/IMAP/POP), recomendo o uso do SQUID somente para HTTP, nem HTTPS seria uma boa opcao, ao nao ser, que voce faca uma permissao especifica para cada dominio https.

Da uma lida melhor no site oficial: http://www.squid-cache.org/

Boa sorte amigo! :)