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InterFAX has been offering computer-based faxing services since 1996. Initially a fax-on-demand service, the company went on to offer fax broadcasting, and in 1999 launched an Internet faxing system with send and receive capability. InterFAX serves tens of thousands of users, who send and receive over 60 million pages a year.
InterFAX API - Fax From Any Development Environment. The InterFAX service accepts files in all popular Office formats - as well as PDF and HTML - and sends them to a fax number you specify. All three interfaces support basic fax sending for quick and simple faxing, as well as advanced fax API functionality such as multiple destinations, deferred transmission, document resolution, and more.