<prompt> Translate the following text to SwahiliFirst, a mailer could find that mail presorted andor barcoded zips through the system without delay while other mail, which needs more postal attention, is either delayed or is unpredictable.  <response>: Kwanza, barua inaweza kupata kwamba barua presorted na au barcodes zip kupitia mfumo bila kuchelewesha wakati barua nyingine, ambayo inahitaji tahadhari zaidi posta, ama ni kucheleweshwa au ni unpredictable. 