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Resend

How to send email with Resend

How to send transactional email notifications to Resend with Knock.

Knock integrates with Resend to send email notifications to your users. Note: you will need an existing Resend account to set up this integration.

In this guide you'll learn how to get started sending transactional email notifications with Resend through Knock. We also cover provider configuration details.

Features

  • Attachments support
  • Delivery tracking
  • Bounce support
  • Knock link and open tracking
  • Per environment configuration
  • Sandbox mode

Getting started

You can create a new Resend channel in the dashboard under the Integrations > Channels section. From there, you'll need to configure the channel for each environment you have.

Channel configuration

The following channel settings should be configured per environment. Navigate to Integrations > Channels in your dashboard, select your Resend channel, then click "Manage configuration" under the environment that you'd like to configure.

Fields marked with an * are required.

Knock settings

Sandbox modeboolean
Whether to enable sandbox mode for your Resend channel.
Knock open trackingboolean
Whether to enable Knock email-open tracking.
Knock link trackingboolean
Whether to enable Knock link-click tracking.

Provider settings for Resend

API keystring*
The API key for your Resend account, available from your Resend dashboard.
From email addressstring | liquid*
The default sender email address (can use Liquid tags).
From namestring | liquid
The default sender name (can use Liquid tags).

When configured, these optional overrides will apply to all emails sent from this channel in the configured environment. Learn more about email channel overrides here.

Tostring | liquid
The To email address that email notifications will be sent to (can use Liquid tags). This value will override the designated recipient's email address.
Ccstring | liquid
The CC email address that email notifications will be sent to (can use Liquid tags).
Bccstring | liquid
The BCC email address that email notifications will be sent to (can use Liquid tags).
Reply-tostring | liquid
The reply-to email address that will be included on email notifications (can use Liquid tags).
Payload overridesJSON (string) | liquid
Provide a JSON object to merge into the API payload that is sent to the downstream provider.

Set optional per-environment conditions for this channel. These conditions are evaluated each time a workflow run encounters a step that uses this channel in the configured environment. If the conditions are not met, the step will be skipped.

Recipient data requirements

To send an email notification you'll need a valid email property set on your recipient.

Debugging common errors

Identity not found

If you see an Identity not found error in your delivery logs this is because you need to verify your sending domain with Resend (the From email address).

Delivery tracking

Delivery tracking for Resend can result in the following status updates to your message:

  • The message delivery is confirmed and Knock updates the message to delivered
  • The message was not delivered due to a bounce and Knock updates the message to bounced