My take away is that you'd be able to receive your emails and customize the handling of every email. i.e. emails are received and put into specific buckets/fol

My take away is that you'd be able to receive your emails and customize the handling of every email. i.e. emails are received and put into specific buckets/folders and then, per message, a process is triggered to do something unique (put into database, forward to another IMAP'ed box, etc.)