You can create a new MailerSend channel in the dashboard under the Channels and sources page in your account settings. From there, you'll need to configure the channel for each environment you have.

Channel configuration

Configure the following settings per environment. Navigate to Channels and sources in your dashboard account settings and select your MailerSend channel. Under Environment configurations, click the environment you'd like to configure to expand its settings, then click "Save changes" when you're done. Expand Advanced for additional options, including overrides and conditions.

Fields marked with an * are required.

API keystring*

The API key from MailerSend. Must have SMS sending permission.

Phone numberstring*

The phone number to send messages from.

Sandbox modeboolean

Whether to enable sandbox mode for your MailerSend channel.

Link trackingboolean

Whether to enable Knock link-click tracking.

When configured, the optional payload overrides set here will apply to all SMS notifications sent from this channel in the configured environment. Learn more about SMS channel overrides here.

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

In order to send an SMS notification you'll need a valid phone_number property set on your recipient.