当我想在Laravel 5.2中从我的应用发送电子邮件时，我收到以下错误：
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
这是我的配置：
MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=mymail@gmail.com
MAIL_PASSWORD=password
MAIL_ENCRYPTION=tls
mail.php：
'driver' => env('MAIL_DRIVER', 'smtp'),
'host' => env('MAIL_HOST', 'smtp.mailgun.org'),
'port' => env('MAIL_PORT', 587),
'from' => ['address' => 'mymail@gmail.com', 'name' => 'yassirxx'],
'encryption' => env('MAIL_ENCRYPTION', 'tls'),
'username' => env('MAIL_USERNAME'),
'password' => env('MAIL_PASSWORD'),
'sendmail' => '/usr/sbin/sendmail -bs'