How to Change "scanner@comcast.net"

I use scan to email a lot, and have a lot of clients that use scan to email.  Incoming or outgoing, the email always reads as from "scanner@comcast.net".  So I have no idea who its from until i open it. My email filters/labels dont work properly etc. Its just a pain.   It dont matter what brand machine sends the scan (cannon, ricio, hp, brother) or what city that machine is in. It all reads as from scanner@comcast.net. Is this a setting that needs to be changed on the machine sending the scans or is this a default of some kind from using comcast internet to send them?  If it is a default of using comcast business internet, is there a way to register that machine so it displays the company name instead of "scanner"?  

Thanks in advance.