On 2018-02-27, Jakob Schürz via Exim-users <exim-users@exim.org> wrote:
> Hi!
>
> We have a application, which creates many emails. Notifications from a
> ticketsystem to the subscribed users for each ticket on changes, or
> something else.
>
> We use gmail suite as our email-provider, and gmail has some
> send-limitations. So, if many tickets are created as a bulk, many many
> emails are created from the app, and the mailserver blocks the sender
> for 10 minutes. Most of the created emails go to the error-mail-queue
> from the app and must be resent manually.
>
> There is a workaround on the vendor-site, because the app itself cannot
> handle to ratelimit the sent emails.
>
> The workaround is, to put a local mailqueue in between, which ratelimits
> the outgoing message-count.
>
> I want to realize this with exim4, if there is a possibility to set a
> hard limit for a specific smart/relayhost for outgoing emails. The app
> can send as much emails as used, and the mailserver queues them all and
> send them to gmail-relay-host in packages of 80 mails per minute. Not more!
>
> How can i handle this with exim4?
my pervious advice was wrong, as Jeremey says it's not simple:
it should be
event_action=${acl{accept delay=1s}}
or better
event_action=${if eq{$event_name}{msg:delivery}\
{${acl{accept delay=1s}}}}
to give a max rate close to 60 per minute.
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