Netmail Search 6.x
Netmail Search is a web-based application running on the Jetty web server. Since this is an end-user portal, the URL is accessible throughout the organization and potentially externally as well. Savvy users will discover the /css or /images virtual directories which can also be browsed at that URL. Although it's not sensitive information (and read-only) some administrators prefer it not be visible. This article explains how to prevent end-users from browsing these directories.
On the Netmail Search server, navigate to C:\Program Files (x86)\Messaging Architects\RemoteProvider\WebContent\css
Create a new file called index.html with the following text inside: <meta http-equiv="refresh" content="0; url=http://my.url.com/">
Repeat for the ..\WebContent\images folder.
Now when attempting to reach these virtual directories with a web browser, the user will be automatically redirected to the URL of your choice.