Option 1
A pack, right away
Two clicks, payment, capacity available within the second. Your subscription does not move by a cent.
Quotas and alerts
Elsewhere, isolating quotas requires an Enterprise plan. Here it is included from twelve euros a month, because it is the condition for a team to work in peace.
90 % alert sent
limit reached, messages refused
// Ceilings live in the API, so they live in your IaC.
await facteur.inboxes.update('j3k9x2mq', {
quota: {
daily: 5_000, // an infinite loop stops here
monthly: 80_000, // the month's budget
// 'reject': CI stops dead, with an explicit SMTP refusal.
// 'alert' : we warn, we let it through.
onExceed: 'reject',
},
});Detail
Quota isolation is not a commercial negotiation lever. It is the minimum for a team to share an account without getting in each other’s way, so it is included from the Solo plan.
Both, independently, per inbox. The daily limit protects against infinite loops; the monthly one protects the budget.
On overage the inbox refuses messages at the SMTP level, and your test fails cleanly with an explicit error code, or it keeps accepting and merely alerts. Whether the inbox serves CI or a customer demo, the right choice differs.
One alert per threshold crossed, never twice for the same one, and at most four thresholds. Beyond that they are reminders, not alerts.
Up to three destinations per alert: an address, a Slack channel, a Discord channel, in whatever combination you want. The alert carries the figure, the organisation, the workspace and the inbox it concerns, and a link to the usage screen.
The dashboard answers “who used my quota”, not just “how much did I use”. Per inbox and per day.
A maximum beyond which we stop billing pay-as-you-go. A surprise bill is a design defect, not a fact of life.
The daily ceiling, the monthly one and the behaviour on overage are set with an API key: your quotas live in your repository, not in the memory of whoever last clicked. Where alerts go is set from the application, and only there. A stolen key could otherwise silence every alert an account has, and the symptom of a silenced alert is silence.
And when it overflows
Exceeding a quota is a normal event in a project’s life. It should not be an incident.
Option 1
Two clicks, payment, capacity available within the second. Your subscription does not move by a cent.
Option 2
Nothing to do, nothing breaks, billed on usage within your spending cap.
Option 3
An explicit SMTP rejection rather than a message swallowed in silence. Your test fails for the right reason, and you see it.
Per-inbox quotas, progressive alerts and a spending cap: included from the Solo plan, with no sales conversation.