Add Email Function To Reminder App

I need a function added to an existing custom coded reminder app that allows users to create reminders via email. This is how it will work: 1) User sends email with reminder string e.g "meeting with jane tomorrow at 6pm" 2) Our semantic script (we have already coded a php script that can extract dates/times and event from a string and is in use on the website) will process the email. You will need to figure out a way to parse the email through the script 3) User receives an email back that the reminder has been added successfully or not so. -- There is also one other part to this project: currently when a user is logged in, and they return to the site they are taken to the homepage - instead I would like the user to be redirected straight to the members area.