postfix-Postfwd rate limit

Question

I have total 4000 mail for an outgoing recipient and I want to send mail 2 mail every 1 minute. so I have configured postfwd.

#/etc/postfwd.cf
id=RATE01 ; action=rate($$recipient_domain/1/60/450 4.7.1 Message delivery request rate limit exceeded)

and

smtpd_recipient_restrictions =
                      permit_mynetworks,
                check_policy_service inet:127.0.0.1:10040,
                permit_sasl_authenticated,
                127.0.0.1:10040_time_limit = 3600,
                reject_unauth_destination

after 2 mails all the mails rejected and mailq empty. my requirment is send 2 mail and hold the mail for 1 minutes and send mail again.

Esa Jokinen · Answer

Your current PostFWD rate limiting approach affects mail before it gets to queue, causing your Postfix to reject mail.

Take a look at these configuration parameters that controls behaviour of outbound connections:

default_destination_rate_delay (default: 0s)
  
  The default amount of delay that is inserted between individual
  deliveries to the same destination; the resulting behavior depends on
  the value of the corresponding per-destination recipient limit.
  
  default_destination_recipient_limit (default: 50)
  
  The default maximal number of recipients per message delivery. This is
  the default limit for delivery via the lmtp(8), pipe(8), smtp(8) and
  virtual(8) delivery agents.

postfix-Postfwd rate limit

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