Send Email from Symfony with the turboSMTP Mailer Bridge

Status: Merged upstream for the upcoming Symfony 8.2 release. The bridge source supports the HTTP API, SMTP relay, EU endpoints, and delivery webhooks through Symfony’s RemoteEvent component.

Checked on 27 October 2026: Symfony 8.2 is under development, with release planned for November 2026. Packagist currently lists a development version. The bridge configuration below is for that upcoming release.

Use standard SMTP today

Existing Symfony Mailer versions can use turboSMTP through their built-in SMTP transport:

.env

# Global, STARTTLS on port 587
MAILER_DSN=smtp://KEY:SECRET@pro.turbo-smtp.com:587

# EU, STARTTLS on port 587
MAILER_DSN=smtp://KEY:SECRET@pro.eu.turbo-smtp.com:587

Use your Consumer Key as KEY and Consumer Secret as SECRET. URL-encode credentials that contain reserved URI characters. Both hosts support STARTTLS on 587 or 2525 and implicit TLS on 465 or 25025; port 25 is also available.

Install the bridge after its stable release

Once a stable version is published and compatible with your application:

composer require symfony/turbo-smtp-mailer

Choose a transport

Set MAILER_DSN in your .env file. Replace KEY and SECRET with your Consumer Key and Consumer Secret.

.env

# HTTP API, Global
MAILER_DSN=turbosmtp+api://KEY:SECRET@default

# HTTP API, EU
MAILER_DSN=turbosmtp+api://KEY:SECRET@api.eu.turbo-smtp.com

# SMTP relay, Global
MAILER_DSN=turbosmtp+smtp://KEY:SECRET@default

# SMTP relay, EU
MAILER_DSN=turbosmtp+smtp://KEY:SECRET@pro.eu.turbo-smtp.com

The bridge’s SMTP transport defaults to port 587 with STARTTLS on both hosts. Use the EU DSNs for the European sending endpoint. See base URLs.

Send the first message

use Symfony\Component\Mailer\MailerInterface;
use Symfony\Component\Mime\Email;

$email = (new Email())
    ->from('noreply@your-domain.example')
    ->to('developer@example.com')
    ->subject('Hello from Symfony')
    ->text('The TurboSMTP bridge is working.');

$mailer->send($email);

Delivery events

The upcoming bridge includes a turbosmtp webhook parser and RemoteEvent converter. Configure the callback under Settings → Notifications → Webhooks → Edit, subject to your plan and event availability. Requests are unsigned; configure HTTP Basic credentials in the callback URL and the matching route secret. See webhooks.

Overview

Frameworks & Libraries

Apps & Platforms

Send Email from Symfony with the turboSMTP Mailer Bridge

Use standard SMTP today

Install the bridge after its stable release

Choose a transport

Send the first message

Delivery events

Resources

Bridge Source

Merged Pull Request

​Use standard SMTP today

​Install the bridge after its stable release

​Choose a transport

​Send the first message

​Delivery events

​Resources

Bridge Source

Merged Pull Request

Use standard SMTP today

Install the bridge after its stable release

Choose a transport

Send the first message

Delivery events

Resources