Mail-Lock falls into a new category of email protection software, which the vendor calls email personal information containment, or EPIC for short. The software is claimed to allow users to carefully control what recipients of email can do with the messages and certain types of attachments. It does this using encryption technology to limit the functions within Outlook, as well as the length of time a message can be viewed by the recipient. The time control element is, as far as we can determine, the package's unique function within the POP-3/SMTP environment.
This version of Mail-Lock is designed to function as an add-in for Microsoft Outlook in all its desktop Windows variants, protecting the text of the email, as well as MS-Word, Excel and Powerpoint attachments. If an attachment from another application is attached and sent, Mail-Lock cannot control what happens to the attachment at the recipient's PC: it will simply open as normal. The company is developing versions for Outlook Express and Lotus Notes users, but no timescales for the updated releases have been made.
ViraLock takes a different approach to securing a users' email system from the ravages of viruses and other malware. Rather than prevent a virus infection, the software is designed to work with existing anti-virus applications and firewall systems to prevent a users' mailbox from being compromised by an executable of any type.