On 4/19/2012 11:55 PM, Vishal Agarwal wrote:
>                 I want to keep the messages waiting in queue for
> delivery for certain time of period  (say 10 minutes) destination
> wise. Presently as soon as the message is being received by postfix
> is being delivered in the same time. I want to keep message staying
> in queue for delivery for 10 minutes, and that also destination wise.

Noel Jones:
> Postfix does not have any controls for delaying mail.
>
> You might be able to hack something together with some scripts using
> the postsuper hold/release functions.
> http://www.postfix.org/postsuper.1.html

Postfix provides per-destination rate limits, not per-message delays.

http://www.postfix.org/postconf.5.html#transport_destination_rate_delay

Example: smtp_destination_rate_delay = 600

        Wietse

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