The problem with fax machine is that it is a physical machine. Every time you have to use this machine you have to enter a number to it, along with paper and ink sometimes. This causes a lot of physical activities and hence consumes a lot of time as well. This activity has been completely eliminated using e-fax which uses email for fax delivery. Online physical activity required in this case is to scan the original paper based documents into digital format using a scanner. These scanned images are further sent over for digital delivery to recipient, where they can be printed. Check out the internet for top online fax service providers.