<prompt> Translate the following text to SwahiliA traditional direct mail solicitation usually contains legal reassurances that the solicitation is authorized and the cost of postage makes an unauthorized mailing an expensive proposition, which some e-mail solicitations currently lack.  <response>: Maombi ya barua moja kwa moja ya jadi kwa kawaida yana uhakikisho wa kisheria kwamba ombi hilo limeidhinishwa na gharama ya posta hufanya barua isiyoidhinishwa kuwa pendekezo la gharama kubwa, ambayo baadhi ya maombi ya barua pepe kwa sasa hayana. 