The throttling option correctly calculates the number of milliseconds that each mail request should sleep for, IF the server can only execute one request at a time.
However, some servers may have multiple execution workers (e.g. "children" in PHP-FPM) working in parallel. This increases the number of requests potentially served per second, which means the throttle sleep time may not be adequate to avoid hitting the rate limit.
Add a setting called something like "multiplier" alongside the throttling toggle. Minimum 1, default 1. It would multiply the $per_second value in AmazonSesHandler->getSleepTime()
Before:
$per_second = ceil(1000000 / $results['MaxSendRate']);
After, something like:
$per_second = ceil(1000000 * $multiplier / $results['MaxSendRate']);
Fixed
3.0
Code
Issue #3346554: Throttling: add multiplier setting
Automatically closed - issue fixed for 2 weeks with no activity.