hi! there is lots of room for more info on both of your questions, but you may be interested in these earlier posts .. I know there's was a very lengthy one about addressing, particularly for Japan, but have given up searching :)

addresses

• When did houses first get assigned house numbers?

• Did streets in Rome use street numbers during the Republic and/or Empire period?

postal services

• Did the Romans have a commercial postal service?

• Did the Romans have a system of mail? If so, how were these delivered to the right addressee?

• Did Rome have anything like a postal service? I mean, if you have such a huge empire, how are messages sent between government officials or just between commoners?

• How did mail work in the 1500s/1600s?

• How did the trans-atlantic postal service between the U.S. and European countries develop? Was it rather hit-or-miss delivery success before reaching today's efficiency?

• how reliable and fast were postal services throughout history?

• How did mail get around in feudal Japan?

... and alternative methods in the FAQ: Communications