Hi, Sorry for asking a well known question. My squid configuration seems to be fine too. but the outlook express at client machine is not working. My configuration: eth0: 192.168.1.97 (My Public IP) eth1: 192.168.5.1 (My Lan IP) I have declared 25 and 110 as the safe ports also but still :(( Based on therad i saw at linux solve, I tried to do /sbin/iptables -t nat -A POSTROUTING -o eth1 -s 192.168.0.0/24 -j MASQUERADE But this also having no effect. After lot of trials i even tried to disable iptables(https://phone.cs.columbia.edu/cinema/help/Online_documentation/Install/Troubleshoot4.html) and checked for the outlook but still it is not working. plz guide me to make my pop3 and smtp connections as transparent. regards, Anuradha
