Plunk for Craft CMS

This plugin provides a Plunk mail transport adapter for Craft CMS.

Requirements

This plugin requires Craft CMS 4.0.0+ or 5.0.0+.

Installation

Install the plugin with Composer:

composer require rareform/craft-plunk
php craft plugin/install plunk

Setup

Once Plunk is installed:

1. Go to Settings -> Email in the Craft control panel.
2. Change Transport Type to Plunk.
3. Enter your Secret API Key. Plunk's /v1/send endpoint requires a secret key (sk_*).
4. Leave API Base URL blank to use hosted Plunk, or set it to your self-hosted Plunk API origin.
5. Confirm your Craft system email address uses a domain that is verified in Plunk.
6. Click Save and send Craft's test email.

Environment Variables

Both settings support Craft environment aliases and environment variables.

PLUNK_SECRET_KEY=sk_your_secret_key
PLUNK_API_BASE_URL=https://next-api.useplunk.com

Use $PLUNK_SECRET_KEY for the Secret API Key setting and $PLUNK_API_BASE_URL for the API Base URL setting.

For self-hosted Plunk installs, set API Base URL to the API root, without /v1/send. The transport appends /v1/send automatically.

Notes

This adapter is intentionally focused on Craft mail delivery. It sends the subject, HTML/text body, sender, recipients, reply-to address, custom headers, and attachments from Craft through Plunk's transactional send API. Plunk templates, contact data, subscription state, workflows, and event tracking are not exposed as plugin settings in this release.

Plunk's transactional API does not provide separate CC or BCC fields. Messages with CC or BCC recipients are rejected by the transport so those recipients are not silently dropped.