If like me, your clients love Concrete 5 and how easy it is to use. The main gripe my clients have with the system is how it sends emails from a C5 form.
Typically, when an email is received in your mail program, it will display the address of the admin of your website or an email address set within the form (usually an email from the company that owns the site).
This may seem like a small annoyance, but when you receive lots of emails in one day that you can't simply hit reply too, it can get rather annoying.
Below is replacement code for the controller.php for C5's form block (tested in 18.104.22.168 & 5.5.1) that will populate the emails from field to the user who filled out the form.
DOES NOT CURRENTLY WORK IN 5.6.0 or 5.6.1. We are working on a fix.