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Interpretation of _recipient_limit directives?

From: Jem Berkes (lists03pc9.org)
Date: Sun Nov 02 2003 - 15:15:43 CST


I recently realized that I was not exactly sure what the _recipient_limit
directives do (for example: local_destination_recipient_limit)

Take for instance a transport 'foo' that uses ${sender} and ${recipient}. I
have seen through experiment that if _the_same_ unique message is going to
multiple recipients, then ${recipient} can expand to multiple addresses and
the transport receipts _a_single_ message as input. No problems here.

But I'm uncertain about the following. If there are several distinct
messages going to a mixture of recipients:

Message X to recipients alpha, bravo
Message Y to recipient charlie

And these are coming in at the same time, does postfix ever combine the
transport of messages X _and_ Y into one operation? In other words, can a
transport receive multiple, distinct messages?