I have a Zimbra cluster setup like this:
node primary.example.com, IP 10.0.0.2
node secondary.example.com, IP 10.0.0.3
cluster service name mail.example.com, cluster service IP 10.0.0.4
I would like to setup postfix so that it uses the cluster service IP address 10.0.0.4 and not the cluster node's own IP address (10.0.0.2) when it's sending mail to outside recipients.
Elsewhere it is said that one shouldn't use postfix's smtp_bind_address to achieve the desired end result. Is there any other way to do it?