Hiya, sorry you are having trouble getting your forms to work.
This Common Issue is the first port of call to debug any forms issues.
We also recommend trying to search the forums or look at topics tagged Netlify forms if you haven’t already - it’s likely your question was already asked by someone else!
If you are still having problems, please provide more information such as what you have already tried, and a link to your live form.
I followed the advice on the page and at the bottom it said to start a new post using the template at the bottom of the thread. To reiterate the troubleshooting advice in my case:
data-netlify=true is set
The form has a name attribute
There is only one form, therefore the name is unique
Every input has a name
Every input name is unique
Form is POSTed and enctype=application/x-www-form-urlencoded
I used https://www.browserling.com/ to test my site from another IP address using legitimate email address and entered a normal message into the form.