The SMTP fax gateway for Windows, a component of the Windows Small Business Server solution, enables Outlook users to send and receive faxes just as easily as they send and receive email messages. Users can launch an Outlook mail message, attach documents in their native file format and address the Outlook message to fax and email recipients. With Exchange fax server, fax messages can also be initiated from within an application by printing to the Fax Printer.

Completion status messages indicating success or failure of each fax job, with detailed explanations, are returned to users as mail messages. Received faxes are delivered to users as email messages. Users can receive the fax in formats such as TIFF and PDF attachments, or they can receive an email message alerting them of a received fax and providing them with a UNC location where they can retrieve the fax.