A system that enables users to conveniently and intuitively send email messages that automatically publish information in appropriate shared content sources. The system allows users to send email messages to shared sources based on keywords within text entered as destination email addresses. The shared sources register interest in certain topics by registering keywords with the email server system. An email server program then sends the email messages it receives for publication to the appropriate shared source(s) based on matching text in the destination address fields of the received messages with the keywords registered by the shared sources.