Messaging is one of the most critical components of an organization's IT structure, and is therefore one of the most obvious candidates to secure. Fortunately, ISA's securing capabilities in this realm are extremely strong, and ISA makes it possible to protect OWA, SMTP, OMA, RPC-HTTP, ActiveSync, POP, and IMAP messaging traffic and protocols, making it a versatile tool in the fight against modern viruses and exploits.