How to add headers to email in Laravel 5.1 - php

Question

Is there a way to add default headers to all emails in Laravel 5.1? I want all emails to be sent with the following header:
x-mailgun-native-send: true

Answer 1

Laravel uses SwiftMailer for mail sending.
When you use Mail facade to send an email, you call send() method and define a callback:
\Mail::send('emails.reminder', ['user' => $user], function ($m) use ($user) {
$m->to($user->email, $user->name)->subject('Your Reminder!');
});
Callback receives $m variable that is an \Illuminate\Mail\Message object, that has getSwiftMessage() method that returns \Swift_Message object which you can use to set headers:
$swiftMessage = $m->getSwiftMessage();
$headers = $swiftMessage->getHeaders();
$headers->addTextHeader('x-mailgun-native-send', 'true');

Answer 2

I know this is an old post, but I'm passing by the same problem right now and I think this could be useful to others.
If you're using a structure exactly as shown in Laravel (6.x and 7.x), like this:
/**
* Build the message.
*
* #return $this
*/
public function build()
{
return $this->from('example#example.com')
->view('emails.orders.shipped');
}
you could add headers to the E-mail in the format below:
public function build()
{
return $this->from('example#example.com')
->view('emails.orders.shipped')
->withSwiftMessage(function ($message) {
$message->getHeaders()
->addTextHeader('Custom-Header', 'HeaderValue');
});
}
I hope this could be useful.
link to the current documentation:https://laravel.com/docs/7.x/mail#customizing-the-swiftmailer-message

Answer 3

Slight modification to #maxim-lanin's answer. You can use it like this, fluently.
\Mail::send('email.view', ['user' => $user], function ($message) use ($user) {
$message->to($user->email, $user->name)
->subject('your message')
->getSwiftMessage()
->getHeaders()
->addTextHeader('x-mailgun-native-send', 'true');
});

Answer 4

For those who need to add this configuration to all emails (like me), there is a practical way using listeners.
Create a Listener:
php artisan make:listener MessageSendingListener
Add the following content to the MessageSendingListener:
<?php
namespace App\Listeners;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Mail\Events\MessageSending;
use Illuminate\Queue\InteractsWithQueue;
class MessageSendingListener
{
/**
* Handle the event.
*
* #param \Illuminate\Mail\Events\MessageSending $event
* #return void
*/
public function handle(MessageSending $event)
{
$event->message
->getHeaders()
->addTextHeader('x-mailgun-native-send', 'true');
}
}
Add the configuration to the application's event mapping array in EventServiceProvider:
<?php
namespace App\Providers;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
class EventServiceProvider extends ServiceProvider
{
/**
* The event listener mappings for the application.
*
* #var array
*/
protected $listen = [
// ...
\Illuminate\Mail\Events\MessageSending::class => [
\App\Listeners\MessageSendingListener::class,
],
];
}
Obs.: Tested with Laravel 7.