On Tue, Dec 07, 2010 at 09:51:17AM -0300, Eduardo J?nior wrote:
> I'm with some doubts about some postfix configuration parameters,
> even after reading [1], not clear to me.
>
> They are:
>
> fast_flush_domains
> delay_warning_time
You need "fast_flush_domains" if want to support ETRN, and or as
administrator you want to be able to run "postqueue -s adomain" for
specified (typically relay) domains. In most cases (i.e. otherwise)
it is best to set "fast_flush_domains =" (empty).
You need "delay_warning_time = 2h" (or similar) if you want to generate
a notice to the sender when a message is delayed in your queue for (in
this example) 2 hours or more. At most one notice will be sent per message
before the message is either delivered or is bounced. In the latter case
a bounce notice is typically sent.
Enabling "delay_warning_time" has no effect on mail already in the queue,
the behaviour for each message depends on the value of the parameter at
the time the message entered queue.
--
Viktor.
