dockersyshome/app/Mail/PromotionMail.php

<?php

namespace App\Mail;

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

class PromotionMail extends Mailable
{
    use Queueable, SerializesModels;

    public $subjectLine;
    public $messageBody;
    public $buttonText;
    public $buttonUrl;
    public $productImage;
    public $company;

    /**
     * Create a new message instance.
     */
    public function __construct($subject, $message, $btnText = null, $btnUrl = null, $image = null, $company = null)
    {
        $this->subjectLine = $subject;
        $this->messageBody = $message;
        $this->buttonText = $btnText;
        $this->buttonUrl = $btnUrl;
        $this->productImage = $image;
        $this->company = $company;
    }

    /**
     * Get the message envelope.
     */
    public function envelope(): Envelope
    {
        return new Envelope(
            subject: $this->subjectLine,
        );
    }

    /**
     * Get the message content definition.
     */
    public function content(): Content
    {
        return new Content(
            markdown: 'emails.promotion',
        );
    }

    /**
     * Get the attachments for the message.
     *
     * @return array<int, \Illuminate\Mail\Mailables\Attachment>
     */
    public function attachments(): array
    {
        return [];
    }
}