---
title: "Alerts"
description: "What BooleanSMTP's Slack, Discord and Telegram alerts are, what triggers one, and where to connect a channel."
image: "https://booleansmtp.com/docs/og.png"
---

> Documentation Index
> Fetch the complete documentation index at: https://booleansmtp.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Alerts

BooleanSMTP can post an alert to **Slack**, **Discord** or **Telegram** when something is wrong with your outgoing email —
so you find out from a message in a channel you already watch, instead of from a customer telling you their password reset
never arrived. There is no email alert channel: if email itself is the thing that's broken, an alert that also depends on
email would not reach you.

## Channels

| Channel | What it needs | Setup guide |
| --- | --- | --- |
| **Slack** | An Incoming Webhook URL | [Slack alerts](/docs/alerts/slack/) |
| **Discord** | A channel webhook URL | [Discord alerts](/docs/alerts/discord/) |
| **Telegram** | A bot token and a Chat ID | [Telegram alerts](/docs/alerts/telegram/) |

## Where alerts are set up

1. In the BooleanSMTP sidebar, click **Alerts**.
2. Find **Slack**, **Discord** or **Telegram** in the provider list, then click **Set up**.
3. Fill in the provider's **Settings** fields; see that provider's setup guide.
4. Leave **Send alerts** on, click **Send Test** to check the connection, then click **Save**.

The provider row then shows **Connected**. From that row you can send another test, click **Edit**, pause alerts with the
switch, or **Disconnect** the provider.

You can add **one channel per provider**. Each provider stays in the list after you connect it.

## What triggers an alert

- **Email delivery failure**: an outgoing email has exhausted its retries and its fallback connection, and is truly
  undeliverable. This does not fire on the first transient error — only once BooleanSMTP has given up on the message.
- **OAuth sign-in expired**: a Google Workspace or Microsoft Outlook connection's OAuth token failed to refresh and needs you to sign
  in again.
- **Connection health check failed**: a connection failed its scheduled health check.

Repeated alerts of the same type and connection are throttled, so a burst of failures doesn't flood your channel with one
message per email.

Source: https://booleansmtp.com/docs/alerts/index.mdx