How to set up a "soft limit" for outgoing emails ?

Yvan

Hi,
Ideally, I would like to set up soft and hard limits for outgoing emails so that:

domain admin, user and mailcow admin can be notified when reaching soft limit
outgoing emails are blocked when reaching hard limit

However, I only found how to define a hard limit. Did I miss something, or Is there a workaround to achieve my goals? At least getting outgoing statistics for each user would be great, so that it can be post processed in a script. A few vague ideas:

use watchdog RATELIMIT_THRESHOLD
use a rspamd module?
query rspamd via its API
query redis directly