By default, Novell Vibe allows only the Vibe administrator to send e-mail messages to the All Users group. If you want to change this functionality to allow anyone to send messages to the All Users group:
Change to the following directory:
Make a backup copy of the ssf-ext.properties file, which is located in the same directory as the ssf.properties file.
Open the ssf.properties file in a text editor.
Search for the following line:
Open the ssf-ext.properties file in a text editor.
Copy the mail.allowSendToAllUsers=false line from the ssf.properties file to the bottom of the ssf-ext.properties file.
Change false to true, so that the line now reads mail.allowSendToAllUsers=true.
Save and close the ssf-ext.properties file.
Close the ssf.properties file without saving it.
Stop and restart Vibe to enable users to send messages to the All Users group in your Vibe site.