3Com Corp and France’s Telesystemes Reseaux are to co-develop an X400 message handling protocol-based gateway, Reach/X400, and an X25 based router, Internet/X25, that the two companies claim will enable the worldwide exchange of electronic mail among 3Com networks: 3+Open Reach/X400 and 3+Open Internet enable IBM Personal Computers and PS/2s, and Apple Computer Inc Macintoshes, on 3+ and 3+Open networks to exchange electronic mail with other IBM and DEC electronic mail systems; Telesystemes is a unit of the French Cogecom SA telecommunications equipment group.