web app - fetch incoming emails, parse, and display content

summary of major aspects of web application: - fetches incoming email from a specified email address (via POP3 or IMAP using CRON or mailer daemon) - parses email (searches for keywords) - categorizes email into groups - distributes content of email to: (1) public page, (2) email list simple app. must scale and be efficient. only 'back-end' coding required, HTML/CSS will be provided. choice of language/platform is open, but have a preference for Python/Django and Ruby/Rails