Which mail driver? You'll need to share your code for the mailable class and the Mail facade call.

The below example shows the expected email subject line is correctly set for both commands queue:work and queue:listen.

App\Mail\Foo.php

namespace App\Mail;

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

class Foo extends Mailable
{
    use Queueable, SerializesModels;

    public function build()
    {
        return $this->subject('foo')->view('mail.foo');
    }
}

resources/views/mail/foo.blade.php

bar

.env

MAIL_MAILER=log

Laravel Tinker

Mail::to('baz@example.com')->queue(new App\Mail\Foo);

command line

Run php artisan queue:work, then repeat the above step and run php artisan queue:listen.

storage/logs/laravel.log

This email header/body is logged using both commands.

From: Laravel <no-reply@example.com>
To: baz@example.com
Subject: foo
MIME-Version: 1.0
Date: Fri, 25 Feb 2022 01:00:18 +0000
Message-ID: <e804f4d5cab4d4661ab669c8b83cc03e@example.com>
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable

bar  

Keep in mind if you're using Mail::fake() and Mail::assertSent()/assertQueued() while testing, the mailable instance build() method must manually be called to make assertions on the subject line.

use App\Mail\Foo;

Mail::fake();

Mail::to('baz@example.com')->queue(new Foo);

// this fails
Mail::assertQueued(Foo::class, function ($mail) {
    // build() hasn't been called so the subject isn't filled yet
    return $mail->subject === 'foo';
});

// this passes
Mail::assertQueued(Foo::class, function ($mail) {
    return $mail->build()->subject === 'foo';
});

Hi there,

Thanks for reporting but it looks like this is a question which can be asked on a support channel. Please only use this issue tracker for reporting bugs with the library itself. If you have a question on how to use functionality provided by this repo you can try one of the following channels:

• Laracasts Forums
• Laravel.io Forums
• StackOverflow
• Discord
• Larachat
• IRC

However, this issue will not be locked and everyone is still free to discuss solutions to your problem!

Thanks.

Thanks @derekmd