It's not a good online fax service
1- The product often doesn't work. There are server interruptions all time time
2 -The UI is so, so, so, so slow.
3 - And lastly- they will shut down your service if you send or receive too many faxes (even if you have paid for a plan that covers unlimited faxing). Our account just got shut down for this reason, and our business relies heavily on online faxing.
Use another service, there are just too many weak spots with onlinefaxes.com