Using the Massmail function you can send all users of your system, or users belonging to specific groups or with specific properties, a mass e-mail. To get the list of users to Massmail, fill out the search page. You can specify more then one criteria for your search. For example, you can search for users who's First Name holds the string 'ben' and Country is Australia or users who's City is 'Amsterdam' and Industry is 'computer-related (software)'. After submitting the form, you will get a window to compose your Massmail. Click on the number of users in the To-field to check to which users you're sending to. Compose your message and send it.