RelayFax is a powerful email-to-fax and fax-to-email fax server. RelayFax automates the process of sending, receiving, and managing your network fax traffic. By integrating into existing email systems, RelayFax provides full faxing capabilities from your desktop. Incoming faxes can be converted to various image formats such as TIFF, JPEG, and BMP. An available Optical Character Recognition (OCR) plug-in for RelayFax can be used to convert faxed images into editable document formats (DOC, PDF, etc.). A single fax can also be sent to multiple destinations and automatically assigned a specific cover page or template based on specific users and groups.

RelayFax connects to any number of POP mailboxes at scheduled intervals and collects waiting fax messages, which the software then emails, faxes, or prints as defined in its configurable fax rules. POP3 and SMTP communications with RelayFax can optionally be encrypted using the Secure Sockets Layer (SSL) and TLS (Transport Layer Security) protocols, to ensure that all transmitted data is secure.

RelayFax supports Fax Over IP (FOIP) with support for up to 30 virtual fax devices that can logon to a SIP-based software PBX. This technology allows sending and receiving faxes directly via VOIP and does not require a fax modem or other fax hardware.