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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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How to stop receiving spam messages from form submitter?Asked by vatech33 on August 18, 2014 at 10:07 AM
You can limit the amount of submissions you are able to receive in various different ways:
For your case I would recommend enabling "Strict Check" in the "Unique Submission" field. This would allow for only one submission per IP address and the spammers will not be able to spam you anymore.
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