I have set up sender dependent transport_maps different clients to use different outgoing ips
>From the document at http://www.postfix.org/postconf.5.html#sender_dependent_default_transport_maps The transport_maps overrides sender_dependent_default_transport_maps What I need to do is reverse. For some senders , I always want to use a different transport regardless of what is there in the transport maps What is the best way of doing this. If I use a FILTER rule. Is FILTER more expensive than sender based maps
