Hi,all: I have built a qmail on my firewall.when I connect qmail from my client MUA,I found the speed is very slow.The welcome information will not been seen in a minutes. Why this things happened ? and because I use firewall ,there are tow NICs. When I see the orignal information of the letter,I found I can see the ip address of the firewall internal ip address.how can i hide my inter address ? jack [EMAIL PROTECTED]