On Mon, Dec 17, 2018 at 10:47:02AM -0500, Alex wrote:
> The original reason I had set it in the first place was to try and control
> the amount of email the bulk senders like constantcontact, mailchimp, etc,
> could send at once, filling our queues with thousands of messages at once.
> This does not appear to be that parameter :-)
Inbound email should not generally result in queue congestion, it
is typically delivered to mailboxes faster than it arrives from
the remote system. Are you accepting email for non-existent
recipients and sending bounces? Best to not do that...
> Ideas for better throttling these bulk senders would be appreciated.
Throttling is often counter-productive, it just means that even
more email arrives later. The examples you give are not botnet
email senders, but mailstream commercial email delivery companies,
so they honour "unsubscribe". If you're receiving unwanted email
from them, you or your users should unsubscribe.
Postfix rate limits are not an anti-spam mechanism, rather they are
safety mechanisms for accidental DoS by one or a few clients when
buggy software sends email in a tight loop.
--
Viktor.
