fwrite(): SSL: Broken pipe / Email

Hi There,

I'm getting following error, when I try to send welcome email with user registration,

ErrorException in StreamBuffer.php line 232:
fwrite(): SSL: Broken pipe

and My Controller is

 /**
     * Create a new user instance after a valid registration.
     *
     * @param  array  $data
     * @return Client
     */
    protected function create(array $data){

       $client = Client::create([
            'name' => $data['name'],
            'telephone' => $data['telephone'],
            'email' => $data['email'],
            'notes' => 'New Account',
            'enabled' => '1',
            'password' => bcrypt($data['password']),
        ]);

       //----------------Send Welcome Email -----------------------------------------
        $data['verification_code']  = $client->verification_code;

        Mail::send('client.email.welcome', $data, function($message) use ($data) {
            $message->from('[email protected]', "Welcome to COS");
            $message->subject("Welcome to COS");
            $message->to($data['email']);
        });

        return  $client;
    }

Please, Can anyone help or advice about this matter ?

Thanks