Several users have pointed out a recent request to technology companies from the Defense Information System Agency for ideas on how to build an e-mail defense system to catch spam. The solution would have to scan about 50 million inbound messages a day across some 700 unclassified network domains. "Defense currently scans e-mails for viruses and spam coming into systems serving the military services, commands or units. DISA wants to extend the protection to the interface between the Internet and its unclassified network, the Non-classified Internet Protocol Router Network. The agency also wants the ability to scan all outbound e-mails from the 5 million users. [...] DISA's request ties in with recommendations that the Defense Science Board issued in April that said Defense is more vulnerable to cyberattacks because of its decentralized networks and systems. The board envisioned a major role for DISA in developing the architecture for enterprise-wide systems."