ERROR
Connection could not be established with host smtp.gmail.com :stream_socket_client(): unable to connect to ssl://smtp.gmail.com:465 (Network is unreachable)
Connection could not be established with host smtp.gmail.com :stream_socket_client(): unable to connect to tls://smtp.gmail.com:587(Network is unreachable)
กรณีท่านใช้ Server ที่มี CSF ให้สั่ง allow ip 74.125.0.0/16