<prompt> Translate the following text to SwahiliNote that the effects of Postal Service adjustments could be substantial and widespread, not only on mailers who have invested heavily around the present structure of products and rates, but also on such competitors as newspapers.  <response>: Hii inaweza kuwa na athari kubwa na ya kuenea, sio tu kwa wauzaji wa barua ambao wamewekeza sana katika muundo wa sasa wa bidhaa na viwango, lakini pia kwa washindani kama vile magazeti. 