Fax access rules Introduction The key strength of the email to fax gateway is to control who can fax from where. Various access control may be used to make sure the fax system does not go out of hand. Beware that the fax system itself does have its own access control. 11.. IIDD Each fax rule has an ID. It is a string which will be referenced in the fax aliases and fax zones. 22.. HHooww ddooeess iitt wwoorrkk The email to fax gateway is a work in progress. Here a small explanation of the access control mecanism it proposes. This may evolved in the future. Comments are welcome. 22..11.. AAcccceessss ccoonnttrrooll An access rule may be open or selective. Mostly, you can specify that faxes are accepted from anywhere, only from the local net, only from fax users or only from the member of the user list of this rule. 22..22.. UUsseerr aauutthheennttiiccaattiioonn You may required that email from fax users be PGP signed so you are sure they come from this user.