I have config zimbra open source with 2 interfaces
eth0 - 192.168.10.1
eth1 - 192.168.15.1
eth0 receiving mails normally but connect eth1 appears message
"your pop3 server has not responded in 60 seconds"
I use outlook express.
with command telnet 192.168.15.1 110 banner +Ok Pop3 ready appear.
sorry my english...