I did quite a bit of searching for an app that works at Folder level and found Gmail Email Exporter [here][1].

Its a paid app (im nothing to do with them) but its cheap and you get to export email addresses from specific folders or all your gmail account.

So in your case put all your email received into a Folder using a filter and use the above to export to a CSV file.

 


 [1]: http://starbanana.com