In addition to the headers consider serving your site by using https. Lots of browsers will never cache https by default. セントーサ島のおすすめスポットを一挙紹介!シンガポール観光完全ガイド That ought to perform. The trouble was that when location a similar Element of the header two times, In the event the false is not really sent as https://www.aeroindustrial.com/como-el-dji-matrice-4e-transforma-la-topografia-y-la-mineria-modernas/