subject = "Your product has been added to October CMS project"
==
<p>Hi {{ name }},</p>
<p>This email does not support plain text.</p>
<p>Sorry about that!</p>
// These variables are available inside the message as Twig
$vars = ['name' => 'Joe', 'user' => 'Mary'];
Mail::send('acme.blog::mail.message', $vars, function($message) {
$message->to('admin@domain.tld', 'Admin Person');
$message->subject('This is a reminder');
});