Methods and systems for processing inbound fax messages in an efficient and scalable manner are provided. According to one embodiment, an inbound fax call is received by an Internet fax system. The fax call has a source address, a destination address and a fax signal. The Internet fax system is coupled to a circuit-switched network and a packet-switched network and includes multiple fax processing resources having different configurations, features, capabilities or capacities. One or more desired fax protocol technical call processing capabilities are determined for processing the fax signal based on one or more of the source address, the destination address, the type of network through which the fax call was received and a service provider through which the fax call was received. Then, a fax processing resource that has the desired fax protocol technical processing capabilities is dynamically selected to translate the fax signal into a digital representation.