You can block junk faxes.
Select Settings on the printer's control panel.
Select General Settings > Fax Settings > Basic Settings > Rejection Fax.
Set the condition to block junk faxes.
Select Rejection Fax, and then enable the following options.
Tap to return to the Rejection Fax screen.
If you are using the Rejection Number List, select Edit Blocked Number list, and then edit the list.