Microsoft Tuesday launched a line of enterprise e-mail security products for its Exchange server software as the company’s first venture into corporate security since it bought Sybari Software 16 months ago. Three renamed and reworked products — Antigen for Exchange, Antigen for SMTP Gateways, and Antigen Spam Manager — rely on multiple scanning engines from Ahnlab, Authentium, Computer Associates, Kaspersky Labs, MailFilters, Norman Data Defense Systems, Sophos, and VirusBuster to sniff out malware and/or spam either at the perimeter edge (Antigen for SMTP Gateways) or inside the network at the Exchange server itself (Antigen for Exchange, Antigen Spam Manager). A three-pack, dubbed Antigen Messaging Security Suite, includes all the components.