Configure qmail using two ethernet card.

[Mark Lo]

Hi,      I have some technical issue to ask.  Okay..I have a web server and mail server located side by side.  The web server is used to send all of the on-line inquires to the mail server.  So I would like to ask how to configure qmail to accept incoming messages by using specific etherent card.  From web server's ethernet care directly to mail server's ethernet card.  Assume I have two ethernet card for both web and mail server.  one ethernet card is to listen from the outside world.   Thank you   Mark