> On 18 Aug 2021, at 3:07 pm, Ron Garret <[email protected]> wrote:
>
>> If you want different processing for inbound and outbound mail,
>> use separate Postfix instances configured appropriately to the
>> task at hand.
>
> There is a useful distinction to be made between mail that is injected into
> the system by an authorized user and mail that is not. I think of the former
> as “outbound” even though that is not technically correct. And it is
> possible to handle these two kinds of messages differently by using a milter
> (there may be other ways as well, but I know for sure that a milter can do
> it). This may not be a smart thing to do, but it is possible.
Milters are primarily for content filtering, they don't or shouldn't
affect address rewriting and message routing.
--
Viktor.
