Files that contain the .req file extension are used by the FidoNet email and file swapping software application. FidoNet is made up of a network that exchanges emails and files using a protocol that is proprietary to the FidoNet software. The program utilizes thousands of computer systems in different parts of the world to make up a vast and powerful network.
The files that contain the .req suffix contain request files that are used by the FidoNet software. These REQ files are sent out through the user's modem to transmit email and Usenet news data from the computer to the associated server.
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If you have additional information about the REQ file format or software that uses files with the REQ suffix, please do get in touch - we would love hearing from you.