mouss wrote: > use multiple instances: run postfix 8 times, each with its own config > dir, queue dir, data dir, ... etc, and configure each for its own > domain(s).
This is something we've run into at work. One customer already uses PowerMTA, and there's another we'd like to discourage. We figured this is probably the way to do it, but I'd like to be sure: Would you leave the "main" instance mostly as-is, and use sender_dependent_relayhost_maps to pass mail through to the additional instances? If you have naive/simplistic mailing software, chances are it's easiest to just pass everything to localhost:25 and let the MTA figure out how to get it to the internet.
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