Below are reserved fields and can be used to configure your form. All fields are optional.
_email_reply_to to recieve emails with the senders email set to reply to. This allows you to reply to user submissions seemlessley from your email.
<input type="email" name="_email_reply_to" />
_email_subject can be used as either a hidden or non-hidden field. The submitted value will take the place of the subject line when receiving an email.
<input type="text" name="_email_subject" />
_email_theme as a hidden field. This will allow you to change the email theme. Currently
plain are accepted. Submitting nothing defaults to
<input type="hidden" name="_email_theme" value="plain" />
_recaptcha_language can be used as either a hidden or non-hidden field. Setting a country code changes the recaptcha language for the user.
<input type="hidden" name="_recaptcha_language" value="en" />
_gotcha as a hidden field. Optionaly use as a layer of protection from bots. If this field is submitted with a value the submission will fail.
<input type="text" name="_gotcha" style="display:none" />