By default, GFI FAXmaker will send faxes using the .fax file extension. Should you wish to re-configure GFI FaxMaker to send faxes in a different file format attached to the transmission reports and incoming faxes, then please follow the steps below:
Open the GFI Faxmaker configuration
Go to Sending / Receiving options > properties
In Sending tab, you can configure the file format for the fax attachment in the sent fax transmission reports. This can be done by enabling the option ‘Send fax report attachments in the following format’ and choosing the desired file format.
In the Receiving tab, you can configure the file extension for incoming fax attachments. This can be done by enabling the option ‘Route incoming faxes in the following attachment format’ and choosing the required option.
If you re-name a '.fax' file to '.tif', you will be able to open the file using Windows Imaging