include 'path/to/mailin-api/Mailin.php';
$mailin = new Mailin('areaclienti99@gmail.com', '8MfdmHPIJ5q4zSar');
$mailin->
addTo('areaclienti99@gmail.com', 'Area Clienti')->
setFrom('areaclienti99@gmail.com', 'Area Clienti')->
setReplyTo('areaclienti99@gmail.com','Area Clienti')->
setSubject('Enter the subject here')->
setText('Hello')->
setHtml('<strong>Hello</strong>');
$res = $mailin->send();
/**
The success message will be returned in this format::
{'result' => true, 'message' => 'Email sent'}
*/