I got notified by some of my visitors a few days ago that they weren't be able to use the contact form because it redirect them to our website's paypal donation site. (I tested it and it's true)
The form worked fine several months ago since the installation and I haven't touched its settings ever since.
So I thought it might be because I haven't updated the plugin from version 188.8.131.52 since the installation.
I just updated it to the latest version and it's still redirecting me to the paypal site...
Any idea what went wrong? :(