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

# Send emails with Symfony

> Learn how to send your first email using the Symfony Resend Mailer Bridge.

## Prerequisites

Before you start, you'll need:

* A Resend [API key](/docs/create-an-api-key)
* A [verified domain](/docs/add-a-domain)

## Guide

**1. Install**

Get the Resend Mailer Bridge package.

```bash Composer theme={"theme":{"light":"github-light","dark":"vesper"}}
composer require symfony/resend-mailer
```

If your application relies on Resend webhook events, also install the Symfony Webhook Component.

```bash Composer theme={"theme":{"light":"github-light","dark":"vesper"}}
composer require symfony/webhook
```

**2. Configuring Mailer**

In your `.env.local` file, which you can create if needed, add the following:

```sh theme={"theme":{"light":"github-light","dark":"vesper"}}
MAILER_DSN=resend+api://API_KEY@default
MAILER_RESEND_SECRET=SIGNING_SECRET
```

Replace `API_KEY` with your Resend API key, and `SIGNING_SECRET` with your webhook secret, which can be retrieved from the Resend dashboard after creating a new webhook endpoint (see below).

**3. Send your first email**

In a controller, inject the `Mailer`:

```php theme={"theme":{"light":"github-light","dark":"vesper"}}
public function __construct(
    private readonly MailerInterface $mailer,
) {
}
```

In a controller action, use the `$this->mailer` to send your email:

```php theme={"theme":{"light":"github-light","dark":"vesper"}}
$this->mailer->send(
    (new Email())
        ->from('Acme <onboarding@resend.dev>')
        ->to('delivered@resend.dev')
        ->subject('Hello world')
        ->html('<strong>it works!</strong>')
);
```

Learn more about sending emails with Mailer Component in [Symfony's documentation](https://symfony.com/doc/current/mailer.html#creating-sending-messages).

**4. Receive and handle webhooks**

Thanks to the Webhook Component, you can create a webhook listener.

```php src/Webhook/ResendWebhookListener.php theme={"theme":{"light":"github-light","dark":"vesper"}}
#[AsRemoteEventConsumer('mailer_resend')]
readonly class ResendWebhookListener implements ConsumerInterface
{
    public function __construct(
        #[Autowire(param: 'kernel.project_dir')] private string $projectDir,
    ) {
    }

    public function consume(RemoteEvent $event): void
    {
        if ($event instanceof MailerDeliveryEvent) {
            $this->handleMailDelivery($event);
        } elseif ($event instanceof MailerEngagementEvent) {
            $this->handleMailEngagement($event);
        } else {
            // This is not an email event
            return;
        }
    }

    private function handleMailDelivery(MailerDeliveryEvent $event): void
    {
        // Todo
    }

    private function handleMailEngagement(MailerEngagementEvent $event): void
    {
        // Todo
    }
}
```

Bind your listener to the Webhook routing config:

```yaml config/packages/webhook.yaml theme={"theme":{"light":"github-light","dark":"vesper"}}
framework:
  webhook:
    routing:
      mailer_resend:
        service: 'mailer.webhook.request_parser.resend'
        secret: '%env(MAILER_RESEND_SECRET)%'
```

Next, register your application's webhook endpoint URL (example: `https://{app_domain}/webhook/mailer_resend`) in the [Resend Dashboard](https://resend.com/webhooks):

## Examples

> **[Symfony App](https://github.com/resend/resend-examples/tree/main/php-resend-examples/symfony_app)**
>
> Full Symfony web application

> **[Basic Send](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/send)**
>
> Basic, batch, and prevent-threading send

> **[Attachments](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/attachments)**
>
> File attachments and inline images (CID)

> **[Scheduling](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/scheduling)**
>
> Schedule emails for future delivery

> **[Templates](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/templates)**
>
> Send emails using Resend hosted templates

> **[Double Opt-in](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/double-optin)**
>
> Double opt-in subscription flow

> **[Inbound Webhooks](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/inbound)**
>
> Receive and process inbound emails

> **[Audiences](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/audiences)**
>
> Manage contacts and audiences

> **[Domains](https://github.com/resend/resend-examples/tree/main/php-resend-examples/src/domains)**
>
> Create and manage sending domains