Having a large database of users for your newsletter campaign is a good way of increasing your site's revenue, but the most crucial part is keeping your subscribers happy. Sending newsletter messages that are not relevant to the subscriber's interests is not a good practice. In order to help you better target your newsletter audience, RSMail! offers the possibility to trim down your general list using the filtering system available in the Subscribers tab and send the newsletter message only to the filtered users. This way you can easily target the subscribers that will receive the message without needing to create separate lists for each interest field.