BindingResolutionException when sending mails in Lumen Jobs

Question

I have no problem sending synchronous mails, but the ones that get executed on a queue using Mail::queue throw the next error:

Illuminate\Contracts\Container\BindingResolutionException: Target [Swift_Transport] is not instantiable while building [Illuminate\Mail\Mailer, Swift_Mailer]. in /var/www/myapp.dev/vendor/illuminate/container/Container.php:804

Everything is configured correctly as emails are being sent when I do it synchronously

Answer 1

After having so much trouble with sending emails inside of Lumen Jobs, I encapsulated the email sending in a Job which works with mailables like this:

MailDispatcher.php

<?php

namespace App\Jobs;

use Illuminate\Contracts\Mail\Mailable;
use Illuminate\Support\Facades\Mail;

class MailDispatcher extends Job {

    public $mail;

    public function __construct(Mailable $mail) {
        $this->mail = $mail;
    }

    public function handle() {
        Mail::send($this->mail);
    }
}

Then when I want to queue a mail...

$mail = new MyMailableMail($user);
dispatch(new MailDispatcher($mail));

And it works correctly