load balancing

[Muhammad Ali]

I have three qmail servers for my LAN. Two are directly connected to Internet for receiving and sending of mails for my LAN. Third one is POP3 server. All users first send their mails to POP3 server which then forwards outgoing mails to one of the two servers which are directly connected to Internet. For load balancing feature, I want that if my POP3 server is queued with lot of mails. He then forward rest of the mails to second server automatically. So the mails may be cleared form both of the servers. I have done this configuration but haven't tested yet:   /var/qmail/control/ smtproutes   :firstqmail.server :secondqmail.server     will this alteration work for load balancing???/