Demo-app\app\Http\Controllers\TestController.php

<?php

namespace App\Http\Controllers;

use App\Http\Controllers;
use Mail;
use Illuminate\Http\Request;
use App\Mail\TestEmailSender;
use Illuminate\Support\Facades\Log;

class TestController extends Controller
{
    public $name;
    public $email;

    public function __construct()
    {}

    public function sendEmail()
    {               
            $this->name = "Deepak";
            $this->email = "deepak.cotocus@gmail.com";
            log::info("I am inside TestController->sendEmail()");
            $emailParams = new \stdClass();
            $emailParams->usersName = $this->name;
            $emailParams->usersEmail = $this->email;
           
            $emailParams->subject = "activate user of Demo-app - Activation Code";

            Mail::to($emailParams->usersEmail)->send(new TestEmailSender($emailParams)); 
      
    }   

    public function test(){
           $this->sendEmail();
    }
}

Demo-app\app\Mail\TestEmailSender.php

<?php

namespace App\Mail;

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

use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Config;

class TestEmailSender extends Mailable
{
    use Queueable, SerializesModels;

    private $emailParams;

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

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        log::info("I am inside Mail/UserActivationLinkMail->build()");

        $this->from(Config::get('app.senderEmail'),Config::get('app.senderName'))
        ->subject($this->emailParams->subject)
        ->view('mail.TestEmail')
        ->with(['emailParams' => $this->emailParams]);
    }
}