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From: Hwan Dong (hwandongyahoo.com)
Date: Wed Dec 31 2008 - 01:51:42 CST
much thanks for your comments. I looked at the backoff. But it is to delay the undelieverable messages, is there any way to delay all the following message for the SAME destination domain?
i.e. if one email to abchotmail.com is rejected, I still have lots of emails to users from hotmail.com, can postfix delay all emails to hotmail.com after rejection to abchotmail.com?
--- On Tue, 12/30/08, Jim Wright <jimwrightthisway.com> wrote:
From: Jim Wright <jimwrightthisway.com>
Subject: Re: postfix questions: when emails are being rejected...
Date: Tuesday, December 30, 2008, 10:30 PM
On Dec 30, 2008, at 11:44 PM, Hwan Dong wrote:
> after there is some rejection, add "sleep/delay" before resuming
sending, this timer could be different from previous "constant sending
delay" as flow-control, this rejection delay is more like "ok, it
seems you are not happy or too busy, I am going to wait a bit. So we have two
timers, one is timer for flow control, another is only fired when being
> Is there any parameter in postfix to play for this rejection timer?If so,
could you give me some tips? If not, do you have some idea how to enhance
postfix to do it, if this is reasonable solution?
It isn't entirely clear what specific problem you are trying to solve, but
reading this may help: http://www.postfix.org/rate.html#backoff
Rejections from various ISPs can happen for any number of reasons, and unless
you look at the specific rejection errors you are getting you are going to have
a hard time correcting the issues. Simply adding delays is unlikely to fix most
Specific log entries would be helpful in troubleshooting further.