JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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When you say you can't send a form to a client, do you mean you cannot share the form's url/the client cannot access it? Or do you mean that the client is not receiving an auto-responder email?
If you are experiencing problems with the auto-responder you can see more details on our guide:
If the problem still persists please let us know more details.