Mailman and postfix

[Márcio Luciano Donada <mdonada@auroraalimentos.com.br>]

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I am using debian etch 4.0 with the postfix and mailman for some lists
that we have. In certain time send a simple e-mail to a list reaches
take up to an hour to make the delivery. There is some kind of
configuration so that it can be resolved in the mailman? And so it was
monitoring the problem is with the same mailman
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