Send mails from laravel app

Laravel app ekakin email ekak yawana widiha dana ganna oni. youtube videos wala thiyena widihata gmail use karala kala. etakota "Expected response code 250 but got code "530", with message "530-5.5.1 Authentication Required" kiyala error ekak enawa.

puluwan kattiya udaw karanna.......... Thanks!!!!