Alerts
The alert emails, the thresholds that trigger them, and what each message says.
A key can carry one alert email. When that key crosses a PV or UV threshold, the gateway mails the address. Alerts are off until an address is set, and clearing the field turns them off again.
Alert emails come with the Basic plan and up: a FREE key has no such field. An address set on a paid plan survives the subscription lapsing, and clearing it is allowed on every plan.
What triggers an email
| Alert | Sent when | Callers get |
|---|---|---|
| Quota 75% used | The key served 75% of its daily PV quota | Nothing is blocked yet |
| Quota exhausted | The key served its whole daily quota | 403 pv quota fused |
| Visitor limit reached | The key served its daily allowance of distinct visitors | 429 uv quota exceeded for new visitors |
Two details are worth knowing, because they decide how noisy the mail is:
- The 75% warning and the exhausted fuse are separate messages. A key that runs out of quota in one day produces both, in that order.
- The visitor-limit message is sent once per day per key. The block itself is not: every newcomer is blocked for the rest of the day, and none of those blocks sends another email.
- Hitting a single visitor's per-visitor cap does not notify anyone — that is a caller looping, not a leak.
What the message says
The mail is plain text and repeats everything needed to act on it without opening the console: the key's name, today's numbers against its quotas, what happens to callers now, and the one thing worth doing. For example:
"landing-demo" — All 1000 daily requests used, forwarding stopped.
The gateway is refusing this key's calls with HTTP 403 and your provider is no
longer being called, so nothing is being billed upstream. The counter resets at
00:00 UTC.
Today so far (UTC 2026-09-13)
Requests served 1000 / 1000
Distinct visitors 41 / 100
What to do: Raise the request quota to resume now, or wait for the reset.
Console: https://sluiceline.com/dashboard/manage
The subject names the key and the crossing —
[Sluiceline] landing-demo stopped forwarding: daily request quota reached — so
a mailbox rule can file these without opening them.
Delivery
| Property | Value |
|---|---|
| Sender | alerts@sluiceline.com |
| Recipient | The address on the key; mail is never sent anywhere else |
| Retries | None. Delivery is fire-and-forget |
| Effect on the caller | None. A failed message never changes the response a client receives |
| Counters | The day's usage, in UTC. Every quota in the product resets at 00:00 UTC |