Laravel Transactional Email: Native Transport Guide

Why Laravel developers are moving away from legacy Mailgun

For years, the default choice for Laravel applications was the built-in Mailgun driver or generic SMTP. However, recent changes to Mailgun pricing tiers, mandatory paid add-ons for log retention, and strict rate limits on entry accounts have driven Laravel engineers to seek leaner alternatives.

Laravel 10, 11, and 12 provide a modern, modular Mail facade built on Symfony Mailer. You do not need bloated third-party vendor packages or complex multipart form SDKs to send high-deliverability transactional emails.

With SadaSend, you can either drop in zero-config SMTP credentials or register a lightweight custom HTTP transport that leverages PHP 8.2+ native cURL / Symfony HttpClient for fast dispatch.

Step 1: Configuring config/mail.php and environment variables

The fastest path to integration is configuring SadaSend as your primary SMTP mailer in your Laravel application.

// .env
MAIL_MAILER=smtp
MAIL_SCHEME=smtp
MAIL_HOST=smtp.sadasend.com
MAIL_PORT=587
MAIL_USERNAME=apikey
MAIL_PASSWORD=sada_live_your_api_key_here
MAIL_ENCRYPTION=tls
MAIL_FROM_ADDRESS="notifications@mail.yourdomain.com"
MAIL_FROM_NAME="${APP_NAME}"

// config/mail.php
'mailers' => [
    'smtp' => [
        'transport' => 'smtp',
        'url' => env('MAIL_URL'),
        'host' => env('MAIL_HOST', 'smtp.sadasend.com'),
        'port' => env('MAIL_PORT', 587),
        'encryption' => env('MAIL_ENCRYPTION', 'tls'),
        'username' => env('MAIL_USERNAME'),
        'password' => env('MAIL_PASSWORD'),
        'timeout' => 10,
        'local_domain' => env('MAIL_EHLO_DOMAIN'),
    ],
],

Step 2: Building a Queued Mailable with Laravel Horizon

Always implement ShouldQueue on transactional Mailables to prevent slow SMTP handshakes from blocking user HTTP requests.

namespace App\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Mail\Mailable;
use Illuminate\Mail\Mailables\Content;
use Illuminate\Mail\Mailables\Envelope;
use Illuminate\Queue\SerializesModels;

class OrderConfirmationMail extends Mailable implements ShouldQueue
{
    use Queueable, SerializesModels;

    public function __construct(public array $order) {}

    public function envelope(): Envelope
    {
        return new Envelope(
            subject: 'Your Order #' . $this->order['id'] . ' has been confirmed',
        );
    }

    public function content(): Content
    {
        return new Content(
            view: 'emails.orders.confirmed',
            with: ['order' => $this->order],
        );
    }
}

Feature Comparison: Legacy Mailgun vs Modern SadaSend in Laravel

Local Development & CI/CD Testing Best Practices

In local development, set MAIL_MAILER=log or configure a scoped SadaSend Staging API key. By setting a recipient allowlist on your staging key, your local php artisan test and staging seeders will never risk emailing real customers if a live database dump is imported.