On Tue, Mar 10, 2009 at 05:27:21PM +0800, Tony Liu wrote:
> I've controlled the mails delivery rate( F.E hotmail ,1mail /10s) in
> postfix, when this mail is delivered the first time, this rate is okay, but
> there is another problem shows, if some mails are back into queue for
> reject reason from one ISP(hotmail), it looks like the re-sending rate is
> not at this rate(I got if from analysis mail logs) , Is there is any way to
> resolve it?
Well, rate-limited transports have an implicit concurrency limit of 1, and
by default the site is declared dead if for any message connections to all
MX hosts are rejected before "MAIL FROM" ([45]xx banner or EHLO response).
So you need to show logs that distinguish between site failure and
simple message transaction deferral. With site failure, you may want
to tweak the setting of:
<http://www.postfix.org/postconf.5.html#transport_destination_concurrency_failed_cohort_limit>
and reading the bug work-around in:
<http://archives.neohapsis.com/archives/postfix/2009-01/1347.html>
This bug will probably be fixed in 2.5.7 (it is also still present in
2.6 snapshots, but will be fixed by 2.6.0).
--
Viktor.
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