1. ,env

                 SENDGRID_API_KEY=''
                

2. composer.json

                {
                  "require": {
                    "sendgrid/sendgrid": "~7"
                  }
                }
                

update composer

                composer update
               

3. call the mail class in the controller

use SendGrid;
use SendGrid\Mail\Mail;

$email = new \SendGrid\Mail\Mail();
$email->setFrom("test@example.com", "Example User");
$email->setSubject("Sending with Twilio SendGrid is Fun");
$email->addTo("test@example.com", "Example User");

$email->addContent(
    "text/html", "<strong>and easy to do anywhere, even with PHP</strong>"
);


$sendgrid = new \SendGrid(getenv('SENDGRID_API_KEY'));
try {
    $response = $sendgrid->send($email);
    print $response->statusCode() . "\n";
    print_r($response->headers());
    print $response->body() . "\n";
} catch (Exception $e) {
    echo 'Caught exception: '. $e->getMessage() ."\n";
}

4. Using template blade

modify the above code as given below

$content = view('emails.paymentSuccess', $email_content)->render();

$email->addContent("text/html", $content);