Laravel Send Mail fails

I installed laravel on my localhost server, i already configured my .env email setting.

This is my .env email setting

MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=pinblackwell@gmail.com
MAIL_PASSWORD=blackwell123
MAIL_ENCRYPTION=tls

This is the error i get.

ErrorException in StreamBuffer.php line 95:
stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

Is there anyone know how to solve this problem? Appreciate that if you could guide me how to solve this.

via Chebli Mohamed