Transactional Email for 
developers

// Configure message and destination address
$to = "[email protected]";
$subject = "Hello World";
$message = "<h1>Testing EnvialoSimple Transaccional</h1>";
$headers = "MIME-Version: 1.0" . "
";
$headers .= "Content-type:text/html;charset=UTF-8" . "
";

// Additional headers
$headers .= 'From: [email protected]' . "
";
$headers .= 'Reply-To: [email protected]' . "
";

// Configure SMTP parameters
ini_set('SMTP', 'smtp.envialosimple.email');
ini_set('smtp_port', '587'); // SMTP port (can be 587 or 465 depending on the server)
ini_set('sendmail_from', '[email protected]'); // Sending address

// Send the email
if(mail($to, $subject, $message, $headers)){
    echo "Email sent successfully";
} else {
    echo "Email sending failed";
}