Email client within a Rails application

I ne开发者_JAVA技巧ed my application to have a module with email functionality. This will have all the functionality of an email client. Each user will have an inbox, outbox, sent folder, custom folders, sub folders etc. They should be able to send, receive,forward, reply to emails. Is there any gem/plugin I can use for this? If there is an alternative to building this like integration with Google Apps etc. then please suggest.

You could simply use ActionMailer. Take a look at this guide to see if it fits your requirements.