Email Filter
The email filter component makes use of a EMAIL library which can be used to parse email messages. It's in early stages currently but it already parses a lot of emails.
You are best off to connect it up to the IMAP Email Feed component. To use it:
Create a component from the Email Filter template using +COMPONENT
See Create a Component if you need a refresher on how to do it.
Have the IMAP Email Feed feed into it
See Linking components for reminder of how you have the IMAP email feeder feed into it.
This is just showing how you can use the email parsing library - lots of interesting applications for this .