use peer\mail\{Message, InternetAddress};

$msg= new Message();
$msg->setFrom(new InternetAddress('friebe@example.com', 'Timm Friebe'));
$msg->addRecipient(TO, new InternetAddress('foo@bar.baz', 'Foo Bar'));
$msg->addRecipient(CC, new InternetAddress('timm@foo.bar', 'Timm Friebe'));
$msg->setHeader('X-Binford', '6100 (more power)');
$msg->setSubject('Hello world');
$msg->setBody('Testmail');

use peer\mail\transport\{MailTransport, TransportException};

$smtp= new MailTransport();
try {
  $smtp->connect();
  $smtp->send($msg);
} catch (TransportException $e) {
  $e->printStackTrace();
}

$smtp->close();

use peer\mail\transport\{SmtpConnection, TransportException};

$smtp= new SmtpConnection('esmtp://user:pass@mail.example.com:25/?auth=login');
try {
  $smtp->connect();
  $smtp->send($msg);
} catch (TransportException $e) {
  $e->printStackTrace();
}

$smtp->close();