On 1/23/2015 10:41 AM, Viktor Dukhovni wrote: > > For custom per-user routing that depends on policy-based factors > force an extra SMTP hop for the entire message via a transport with > recipient concurrency set to 1. On the receiving end of that you > can do per-user FILTER actions as messages will have only one user > at a time (delivered as many times as there are recipients). >
For this specific application, it should be sufficient to use a policy service FILTER action to send only big messages to a second postfix instance, then let that second instance deliver mail "normally" (normal local delivery, empty relayhost setting). There should be no need to set the concurrency to 1. Messages under the target size can be delivered by the primary instance to the relayhost, same as they currently are. One way adds a second hop for all mail, the other makes some mail "special". I don't really like either of these choices. If it's OK to send big mail directly, why not just send it all directly. -- Noel Jones
