need to sent mail from server very slowly .

I have installed postfix server in ubuntu , thats is working fine , but i need to sent mail from server very slowly ,

Because some time we will sent bulk mails , so all mails send together so receiver will consider as a spam, So i need to send mail very slowly , one minute maximum sent 33 mails , same time all mails should be in queue .

Can you advice me how to do that

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Thanks for support , am using default Post-fix configuration only extra i have added below value , but i don’t know below settings will meet my requirement .

smtp_destination_concurrency_limit = 1 smtp_destination_rate_delay = 3s

Regards, Shufil


If you happen to be sending e-mail through an application, most have built-in functionality that allows you to break up bulk e-mail and only send every X seconds or Y minutes, or should. I know way back in 2005, forum software (vBulletin) was using something similar, so modern applications should have something similar to prevent all e-mail being sent at the same time.

You can modify Postfix configuration as well, as noted by @hansen , though I would also look to your application to see if there are configurable options there as well.

Try adding this to your

smtp_destination_concurrency_limit = 1
smtp_destination_rate_delay = 3s