Hello, just my comment on you topic: if I'd design such setup, I'd expect, that sooner or later some additional flexibility is needed, that there will be same tasks you never thought about in advance. I'm not sure, if in such case I'd rely on Postfix. Postfix might be fast, but it is by no means as flexibile as Exim is. Missing performance (of Exim, if this matters) you can buy using more servers. Missing flexibility you can't get easily.
Just my two cents - and because you asked ☺ -- Heiko
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