On 11/11/2009 12:34 AM, coofucoo zhang wrote: > Hi Noel: > I just want to control the sending speed of postfix. Because some of ISP > complain me that my speed is too fast. So I want to make postfix send a > little slowly. I am not sure how can I accomplish this target, so I set up a > test ENV to do testing, to make sure how can I implement it. > Then I found the problem I describe in my first email, you can see it here: > > //************************************************************* > HI ALL: > I try to understand how the initial_destination_concurrency and > default_destination_concurrency_limit work? How can it support to improve > the output of delivery. I do a small test. > I config the postfix like this: > qmgr_message_active_limit = 50 > qmgr_message_recipient_limit = 50 > initial_destination_concurrency = 10 > default_destination_concurrency_limit = 10 > default_destination_rate_delay = 10s > > and then, I send 5 mail to one server, such as t...@a.com, 5 mail for the > other server, such as t...@b.com. > From the server side, I can see postfix send mail one by one. For instance, > from A.com, I can see 5 mails, each is 10s delay the previous one. B.com is > the same with A. > So I feel confuse about how can I use initial_destination_concurrency and > default_destination_concurrency_limit parameters. Because if I change these > 2 parameters to 1, the test result is the same. > > Does anyone know my problem? How can I make postfix work like the manual > described? > //************************************************************* > > From my test, I can see default_destination_rate_delay is work well. But I > do not know why initial_destination_concurrency and > default_destination_concurrency_limit not work. Because from the document, I > think if initial_destination_concurrency is 10, postfix will use 10 smtp > service to do sending. Then that is means 5 mails to the same server will be > send out at the same time. But in fact, it looks like postfix setup 2 smtp > for 2 servers, A and B. it will send one mail to A and then wait for 10s as > my setting. For B it is the same. But how does > initial_destination_concurrency and default_destination_concurrency_limit > work? Do you understand my means? > > Best regrads! > Coofucoo > > > -----邮件原件----- > 发件人: Noel Jones [mailto:njo...@megan.vbhcs.org] > 发送时间: 2009年11月11日 3:36 > 收件人: Coofucoo Zhang; postfix-users@postfix.org > 主题: Re: 答复: who know how does initial_destination_concurrency and > default_destination_concurrency_limit work? > > On 11/10/2009 8:51 AM, Coofucoo Zhang wrote: >> Hi Petrik: >> Thanks. >> But could you tell me why? Or which knobs can I use instead? I just want > to >> control the sending speed of postfix, how can implement? >> > > What's wrong with postfix default delivery scheduling that it > needs to be changed? Describe your problem and you might get > some expert advice. > > At least read the docs before you start twiddling knobs. > http://www.postfix.org/SCHEDULER_README.html > http://www.postfix.org/QSHAPE_README.html > http://www.postfix.org/TUNING_README.html >
In your main.cf, set "default_destination_rate_delay = 1s" and leave all those other parameters at their default. This will instruct postfix to send no more than 60 messages per minute. -- Noel Jones
