I have done a lot of researching rate limit on outbound email.
There seems to be a 'plethora' of ways to do this..
- smtpd_client_connection_rate_limit
- smtpd_client_message_rate_limit
- smtpd_client_recipient_rate_limit
- transport_destination_concurrency_limit
- /etc/postfix/transport
domain.com slow:
and
http://www.postfix.org/TUNING_README.html#rcpts
My Goal
I want to put a "speed limit" on all outbound traffic since 95%
of it goes to 1 of 3 master relays..
i.e.
- when a mis-configured smtp host blasts out over 100k email in 1 hour,
I want to limit the impact on the master relays..
- I want the email to be delivered.. but at a "reasonable" speed.
( limit a 100mph to a 55mph limit.. )
I have tried in /etc/postfix/main.cf
smtpd_client_connection_rate_limit = 10
smtpd_client_message_rate_limit = 10
I expected the email to move at a slower speed through the relay but did not
see any difference.
Thx for any pointers..
Charles
