You are currently reading the documentation for v5, while the latest version is v8.

Throttling sends

Most email providers have a limit on how many emails you can send within a given amount of time. By default, ten mails per second will be sent. In the config file you can customize this behavior by changing the throttling key:

'throttling' => [
    'allowed_number_of_jobs_in_timespan' => 10,
    'timespan_in_seconds' => 1,

     * Throttling relies on the cache. Here you can specify the store to be used.
     * When passing `null`, we'll use the default store.
    'cache_store' => null,
Using templates