I used to be an efax customer, but I found maxemail.com They sell (or used to sell, I"m not sure what happened once efax got bought out a few years back) the software to efax to make their system work. I've been using maxemail for 4 years now. Works great & I've never had a bit of problem with them. They're also about 1/2 the price of efax, if you go with the yearly plan.