Internet fax machines. This has limited the standard's use, though a system for looking up a fax's email address based on its phone number is under development. To work with existing fax machines, all iFax machines support standard faxing (requiring a regular phone line). Alternatively, an iFax can be used in conjunction with a fax gateway. Internet fax Internet fax, e-fax, or online fax is the use of the internet and internet protocols to send a fax (facsimile), rather than using a standard telephone connection and a fax machine. A distinguishing feature of Internet fax, compared to other Internet communications such as
Junk Fax Prevention Act of 2005 of nuisance telemarketing tactics, it included provisions making it illegal for any person to send an unsolicited advertisement to a fax machine. The law further authorized the recipient of a fax sent in violation of the statute (or a regulation promulgated under the statute) to sue the sender in state court to enjoin further violation, recover for actual monetary losses from such a violation, $500 in statutory damages for each violation (whichever is greater), or both. The law also allows the court, in its discretion, to treble these damages if it finds the defendant violated the statute "willfully" or "knowingly."