Providing on-line non-downloadable software for capturing leads/subscribers/followers via custom landing pages, supporting and managing the creation and sending of bulk electronic mail which users can use to design and send out email advertising and promotional campaigns, to track what happens to emails after they are sent out, to develop and manage multiple email lists, to manage bounces and unsubscribes, and to target specific customers with particular promotional emails And also supporting the creation and sending of bulk SMS text messages which users can use to send out SMS marketing campaigns to subscribers