---
title: Set up alert channels
description: "Tell Pastmark Pro where to send alerts: email, a webhook or Slack."
url: "https://docs.prefixwp.com/docs/pastmark/pastmark-pro/set-up-alert-channels/"
updated: "2026-11-10"
category: Pastmark Pro
---

# Set up alert channels

A **delivery channel** is a place where Pastmark Pro sends alerts. For example, an email to your admins, or a Slack channel. You set up a channel once. Then you can use it in many alert rules.

Go to `User Activity → Settings → Alerts → Delivery Channels`.

[![The Delivery Channels tab with the channel Administrators (Email) and the Add Channel button](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channels.webp)](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channels.webp)
The Delivery Channels tab.

Pastmark Pro creates one channel for you: **Administrators (Email)**. It emails every user with the Administrator role.

## Add an email channel

1. Click **Add Channel**.
2. Type a **Channel Name**, for example `Site owners`.
3. Under **Type**, keep **Email**.
4. Choose who gets the email. You can use one, two or all three fields:
   - **Role**: everyone with this role. When you add a new admin, they get alerts too.
   - **Users**: search for users by name or email.
   - **Recipients (comma-separated)**: email addresses without a WordPress account.
5. Click **Save Channel**.

If Role, Users and Recipients are all empty, the email goes to your site's admin email.

[![The Add Delivery Channel form for Email with Channel Name, Type, Role, Users, Recipients, Subject, Body and Available Tags](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channel-email.webp)](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channel-email.webp)
An email channel.

## Add a Slack channel

1. In Slack, create an **incoming webhook** for your channel. Slack gives you a URL that starts with `https://hooks.slack.com/`.
2. In Pastmark, click **Add Channel**.
3. Type a **Channel Name**, for example `#security-alerts`.
4. Under **Type**, choose **Slack**.
5. Paste the URL into **Webhook URL**.
6. Click **Save Channel**.

[![The Add Delivery Channel form for Slack with Webhook URL and a Message template](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channel-slack.webp)](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channel-slack.webp)
A Slack channel.

## Add a webhook channel

Use a webhook to send alerts to another service, for example an automation tool.

1. Click **Add Channel** and choose the **Type** **Webhook**.
2. Enter the **Webhook URL**.
3. If the service needs extra headers, add them under **Extra Headers**, one `Name: Value` per line.
4. Click **Save Channel**.

[![The Add Delivery Channel form for Webhook with Webhook URL and Extra Headers](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channel-webhook.webp)](http://localhost/wp-content/uploads/2026/09/pastmark-pro-channel-webhook.webp)
A webhook channel.

Pastmark Pro sends a `POST` request with JSON data. It includes the rule name, the event type, the action, the severity, the message, the time, the count and a link to the event.

## Edit or delete a channel

Use the pencil icon to edit a channel, and the trash icon to delete it. If you delete a channel, rules that use it stop sending through it.

Test a new channel. Create a rule that fires on an event you can make yourself, for example a failed login. Read [Create alert rules](/docs/pastmark/pastmark-pro/create-alert-rules/).

If a webhook or Slack message fails, Pastmark Pro tries once more. If it still fails, the error is saved in the activity log.