composer require envialosimple/transaccional
use EnvialoSimple\Transaccional;
use EnvialoSimple\Transaccional\Helpers\Builder\MailParams;
$estr = new Transaccional($your_api_key);
$mailParams = new MailParams();
$mailParams
->setFrom('no-reply@mycompany.com', 'MyCompany Notifications')
->setTo('john.doe@example.com', 'John Doe')
->setReplyTo('do-reply@mycompany.com')
->setPreviewText('A glimpse of what comes next...')
->setSubject('This is a subject')
->setHtml('<h1>HTML emails are cool, {{ name }}</h1>')
->setText('Text emails are also cool, {{ name }}')
->setContext(['name' => 'John'])
;
$estr->mail->send($mailParams);