Contact form not quite working right

Have you got a link to the website? I haven't done that course but remember that if it's a php form you'll need php running on the server.
It may sound obvious but have you checked your spam too?

Are you using a contact form pluggin or did you write the contact form yourself? Are you using a PHP framework (CodeIgniter, Cake, Laravel) or are you using WordPress?

Whenever I have run into this problem it has been because the server's SMTP host and port weren't set up correctly either through the pluggin I was using or through the PHP framework's Email Helper Class. All the code for the website looks fine, and PHP is definitely installed (if it weren't I don't think your page would even render, since part of PHP is a script compiler that outputs HTML and without it, some/most/all of your HTML wouldn't be there).

OK, when I sent empty (or incomplete) form, it gave me an error message but did not display the form anymore. It seems there is a problem with a conditional statement, that checks if the form has been sent and if any error was triggered. Basically something like: if (error) display error message and a form, else, display thank you message (and either the contact.php page or whatever other thank you page you may have).

When I submitted complete form but with a bad email, it displayed the error message, however that was the only thing on the page. So there seems to be a problem with the redirect - at this point there should be none. It should simply display the page as normal with and error message that the email address is invalid.

When the form was completed and sent, the page loaded OK with a thank you message, so this part works fine.

It's hard to pinpoint where the problem is without seeing the php code and how it is embedded with your HTML page, but I hope this helps (a little :-)

Okay, for some reason... it just started working now. Don't quite know how. I changed the events that happen when there are errors, thanks for pointing that out (: