Downloading Outlook Express Security 2.3 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions of the Outlook Express Security 2.3, 2.2 and 2.1.
We recommend checking the downloaded files with any free antivirus. This software is a product of Softstack. Outlook Express Security lies within Security Tools, more precisely Privacy. OES.exe is the most common filename for this program's installer.
From the developer:
Outlook Express Security is a software that allows you to control access to Outlook Express and its databases. Outlook Express becomes locked and no third-party programs can access its message base files and the address book. This will allow you to prevent stealing or spoiling of your Outlook Express's data.
You may want to check out more software, such as Outlook Express Backup Genie, Repair Outlook Express Free or Resend Message for Outlook Express & Windows Mail, which might be similar to Outlook Express Security.