I have inspected form at link provided – I got the green success message. However if you are not getting emails then I suggest you see Contact Form 7 Email Issues – this covers emails being considered spam. See also Best Practice to Set Up Mail.
If you find you need more detailed advice, after reading and working through the above links, please include a link to your Contact Form 7 form plus all your input in the Form and Mail sections of the CF7 interface. This should allow others to understand your actual problem and offer a possible solution.
