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? thank you all.
