On Thu, Aug 09, 2012 at 10:36:30PM +0000, Viktor Dukhovni wrote:
>
> Multiple instances also give you a more clear view of the state of
> the system with clearer log entries, separate queues for filtered
> and unfiltered mail, ...
This last item is nothing to sneeze at. It means you can see at a
glance how much of your mail has been through the filter, vs. how much
has yet to be filtered.
> Operationally a multi-instance system is easier to support. It
> takes a small bit of effort to build, this is well worth it.
I am a convert to this point of view. For complex requirements, one
must treat Postfix as an MTA toolkit, from which one builds an MTA.
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