We have two postfix machines, one is a (weak) MX in/out gateway with amavisd+sa+clam that falls way behind during a huge (trusted) outbound send-only distribution list.
The other, powerful postfix machine is not-yet-fully configged next-up to replace the current weak MX, but we can't do that, yet (waiting for sa 3.3.1). We can route all outbound mail through the powerful postfix box. How to set up the powerful outbound box with this sender-based routing: If listsen...@domain.tld, send to Internet Else, send to MX gateway thanks Len
