MailVault allows companies to govern how emails and their attachments are used, control access and provide audit trails. Versions of emails can be expired and authority to print, copy or forward information in emails can be determined also. Additionally, notifications and records are provided that let senders know when and how documents are being used. Most companies react to the occurrence of a problem, rather than react to prevent it. It comes down to thinking about it in advance, making sure you plan.
Cryptography is another means of protecting the content in email messages.
Digital signatures, to know with whom you are doing business, are also part of this. He adds that the majority of companies are failing to secure all these means of communications, yet in the last year awareness has increased. It's also sort of a loaded weapon. Email is just a wonderful channel for spilling out information. Besides corporate email, content on a network can also be accessed through company web sites.