> > I want to queue up incoming external messages and process them
> > periodically say every 5 minutes - open an smtp connection to our internal
> > server and used the same smtp connection to deliver them all in one go.
>
> Set queue_smtp=yes. Run your Exim daemon with "exim -bd -q5m". On your
> internal server (if it is running Exim) set
> smtp_accept_queue_per_connection to something larger than the default 10.
>
> But why? Why not let them get delivered as they arrive?
I made some performance tests and I can achieve a significantly higher
throughput if I queue incoming messages and deliver them all at once to
the mail drop. I run the queue every 10 seconds right now. Our mail
volume has not reached the anticipated amount yet, but flooding the
servers with artificial email showed that queue_smtp helps a lot.
Hopefully I can give some real life numbers within some months.
Michael
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