with entries (by an automatic/human entity) and your email and data management table can get filled with spam. In order to prevent this from happening you can use a feature called "spam protect".
The 'spam protect' feature prevents the spamming in this manner:
Once the form filler presses on the 'submit' button he/she will be asked to fill in characters in the captcha box. If the characters are not entered correctly the form will not be submitted. Since the charachters are presented as an image an automatic entity could not "read" them and fill in the form. Also, if someone wants to submit the form many times he will need to fill in the changing characters each time, which will discourage him from doing so.
Please note! In Safari/IE6/IE7 or in forms smaller than 220x220 pixels the spam protect prompt (in section 3) will appear in a regular pop up window.
Steps to activate the spam protect option:
1- enter your form in the form creator.
2- check the "Spam Protect" checkbox situated in the 'Settings'.
3- Save the form.
This is what the spam protect window looks like when a user tries to submit the form:
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