replace password reset mail template with custom template laravel 5.3

Just a heads up: In addition to the previous answer, there are additional steps if you want to modify the notification lines like You are receiving this..., etc. Below is a step-by-step guide.

You'll need to override the default sendPasswordResetNotification method on your User model.

Why? Because the lines are pulled from Illuminate\Auth\Notifications\ResetPassword.php. Modifying it in the core will mean your changes are lost during an update of Laravel.

To do this, add the following to your your User model.

use App\Notifications\PasswordReset; // Or the location that you store your notifications (this is default).

/**
 * Send the password reset notification.
 *
 * @param  string  $token
 * @return void
 */
public function sendPasswordResetNotification($token)
{
    $this->notify(new PasswordReset($token));
}

Lastly, create that notification:

php artisan make:notification PasswordReset

And example of this notification's content:

/**
 * The password reset token.
 *
 * @var string
 */
public $token;

/**
 * Create a new notification instance.
 *
 * @return void
 */
public function __construct($token)
{
    $this->token = $token;
}

/**
 * Get the notification's delivery channels.
 *
 * @param  mixed  $notifiable
 * @return array
 */
public function via($notifiable)
{
    return ['mail'];
}

/**
 * Build the mail representation of the notification.
 *
 * @param  mixed  $notifiable
 * @return \Illuminate\Notifications\Messages\MailMessage
 */
public function toMail($notifiable)
{
    return (new MailMessage)
        ->line('You are receiving this email because we received a password reset request for your account.') // Here are the lines you can safely override
        ->action('Reset Password', url('password/reset', $this->token))
        ->line('If you did not request a password reset, no further action is required.');
}

Run the following command in the terminal and the two email templates will be copied to your resources/vendor/notifications folder. Then you can modify the templates.

php artisan vendor:publish --tag=laravel-notifications

You can read more about Notifications in Laravel Docs.