Cakephp 3 error trying to send email with gmail

Question

I'm trying to send a verification email using Gmail but i get this error:

stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed stream_socket_client(): Failed to enable crypto stream_socket_client(): unable to connect to ssl://smtp.gmail.com:465 (Unknown error)

I have followed the Configuring Transports guide.

Email::configTransport('gmail', [
  'host' => 'ssl://smtp.gmail.com',
  //'host' => 'smtp.gmail.com',
  'port' => 465,
  'username' => '[email protected]',
  'password' => 'password',
  'className' => 'Smtp',
  'log'=>true,
  //'tls' => true
]); 

$correo = new Email();
$correo
  ->transport('gmail')
  ->template('registro_exito')
  ->emailFormat('html')
  ->to('[email protected]')
  ->from('[email protected]')
  ->viewVars([
    'nombre_sitio_secundario'=>$nombre_sitio_secundario,
    'usuario_id'=>$usuario_id,
    'token'=>$token
  ])
  ->send(); 

And this is the complete error log:

2015-09-24 20:09:39 Error: [Cake\Network\Exception\SocketException] stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
stream_socket_client(): Failed to enable crypto
stream_socket_client(): unable to connect to ssl://smtp.gmail.com:465 (Unknown error)
Request URL: /faindit/usuarios/registro
Stack Trace:
#0 C:\xampp\htdocs\faindit\vendor\cakephp\cakephp\src\Network\Email\SmtpTransport.php(204): Cake\Network\Socket->connect()
#1 C:\xampp\htdocs\faindit\vendor\cakephp\cakephp\src\Network\Email\SmtpTransport.php(159): Cake\Network\Email\SmtpTransport->_connect()
#2 C:\xampp\htdocs\faindit\vendor\cakephp\cakephp\src\Network\Email\Email.php(1301): Cake\Network\Email\SmtpTransport->send(Object(Cake\Network\Email\Email))
#3 C:\xampp\htdocs\faindit\src\Controller\Component\CorreoComponent.php(65): Cake\Network\Email\Email->send()
#4 C:\xampp\htdocs\faindit\src\Controller\UsuariosController.php(14): App\Controller\Component\CorreoComponent->registroExito(1, 'something@gm...')
#5 [internal function]: App\Controller\UsuariosController->registro()
#6 C:\xampp\htdocs\faindit\vendor\cakephp\cakephp\src\Controller\Controller.php(411): call_user_func_array(Array, Array)
#7 C:\xampp\htdocs\faindit\vendor\cakephp\cakephp\src\Routing\Dispatcher.php(114): Cake\Controller\Controller->invokeAction()
#8 C:\xampp\htdocs\faindit\vendor\cakephp\cakephp\src\Routing\Dispatcher.php(87): Cake\Routing\Dispatcher->_invoke(Object(App\Controller\UsuariosController))
#9 C:\xampp\htdocs\faindit\webroot\index.php(37): Cake\Routing\Dispatcher->dispatch(Object(Cake\Network\Request), Object(Cake\Network\Response))
#10 {main}

Worth to mention that openssl es enabled on php and also i have enabled the "access for less secure apps" on Gmail configs.

Thanks for helping!.

Answer 1

Ok i found the "error". Actually the code fine, the issue is with OpenSSL in php 5.6 that verifies every encrypted connection by default BUT my local Lampp doesn't count with a ssl certificate and that couses the error.

The solution is to avoid the verification, so the configTransport code would be like this:

Email::configTransport('gmail', [
  'host' => 'ssl://smtp.gmail.com',
  'port' => 465,
  'username' => '[email protected]',
  'password' => 'password',
  'className' => 'Smtp',
  'log' => true,
  'context' => [
    'ssl' => [
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    ]
  ]
]); 

I took as reference a PHPMailer answer but it was a little challenging knowing how to apply it to Cakephp3.

Hope this information is going to be helpful for somebody else.