I have tried a few email contact forms plugins and in my opinion this is the most simple and flexible one.
Everything worked out of the box, I only changed the "To:" string to "Category:" from the ini file.

Cons: I don't get any error handling, I would expect something like "Please enter your email address", enter subject, etc.
You need a little polishing I think.

Thank you for your development time!

This plugin is a great finding!
I use it together with the module to show a short 'About us' with read more link on the right position.
Thank you very much for developing this!