The Best REAL Free Online Faxing?

Hi It looks like efax is no longer free at least they're now limiting it for only 30 days... can you guys tell me the really best FREE faxing service that provides a toll number for users in the U.S. Sending is not so important to me as receiving but I suppose full functionality would be nice and I dont need international faxing.

thanks!!

I am using k7 it is completely free for receiving and sends straight to your email. only downside is that you need to recieve a fax or voicemail every 30 days or you lose your number