I have substituted up to 2/3 of the private traditional postal mail with e-messages. (Most of the messages that I used to send with the traditional postal mail I now send with e-messages).
Do približno 2/3 navadne pošte sem nadomestil/a z e-pošto. (Večino sporočil, ki sem jih prej pošiljal/a z navadno pošto, sedaj pošiljam z e-pošto).