title: Contact Form 7 - File Types [Wordpress]
body: <p>I want to make site visitors able to send me different, non-usual, file types. Like a PCB document, or a .psd file.
  I've looked through all the code, didn't find any hint.
  All I want is just to disable the file type check.
  Also, I've read somewhere that it has something to do with the Wordpress config files, doesn't matter, I'll change them.
  Thank You in advance.</p>