Managing The Fax Flow 

In the early days, incoming faxes would to go to a general inbox where everyone would shuffle thru them looking for anything addressed to them. In real estate offices the sales people would go through them looking for leads they could steal. Personal financial information was freely available. Not really a secure system.

With e-mail faxes it's a bit more secure. If it comes into a general mailbox it can be forwarded to the appropriate person. However, they are still being read by people they were directly sent to. 

The ideal fix is for each person to have a private e-mail fax number. However, that can get expensive. A better approach is to have an online fax number for each department. 

Another innovation is the ability to have a fax delivered to two separate e-mail addresses. Then, the appropriate person can respond in a timely manner.  

E-mail faxes are still popular in the medical industry where they use HIPAA faxing. 

For more info see FAXtopia.com