One reason why fax machines are still in use is because they immediately provide you with the status of your document's delivery, so you will know if it failed to send or if it went through. Beyond receiving these delivery receipts, however, you can also configure a fax server so that it can log all of thefax documents that it sends and receives, which can be useful for tracking down problems. Additionally, fax machines typically have lower costs than electronic mail or other electronic messaging systems, making them an affordable option for sending documents over long distances.