Internet Faxing (I-FAX) allows you to send and receive FAX documents using the Internet as the transport mechanism. Documents are transmitted in E-mail messages as attached TIFF-F files. This means that PC's are also able to receive and send documents, providing that the PC has as an application that can generate and view TIFF-F files, you can use Microsoft® Imaging or a TIFF-F viewer application [Pages Viewer] is available as a download from the Brother Web site http://www.brother.com. Any documents sent via the MFC will automatically be converted into a TIFF-F format. If you wish to send and receive messages to and from your MFC, your mail application on the PC must be able to support the MIME format.