I don't have the {$iframeURL} in my code.
This is what I have.
<div class="large-8 medium-8 columns">
<form data-abide action="/contact-us-submittion.cfm" method="post">
<div class="row">
<div class="large-12 medium-12 columns">
<div class="row" data-equalizer>
<div class="large-4 medium-4 columns">
<div class="row">
<div class="large-12 columns">
<label>
<input type="text" placeholder="Name" name="name" required>
</label>
<small class="error">Name is required and must be a string.</small>
</div>
</div>
<div class="row">
<div class="large-12 columns">
<label>
<input type="text" placeholder="Email" name="mailfrom" required pattern='.*@.*\..{3}|.*@.*\..{2}'>
</label>
<small class="error">An email address is required.</small>
</div>
</div>
<div class="row">
<div class="large-12 columns">
<input type="text" placeholder="Phone" name="phone">
</div>
</div>
<div class="row">
<div class="large-12 columns">
<div class="g-recaptcha" data-sitekey="6LfjPwITAAABBPbDHdC5wx6HXRmXtqO3pgAItl-E"></div>
</div>
</div>
</div>
<div class="large-8 medium-8 columns">
<div class="row">
<div class="large-12 columns">
<textarea name="message" placeholder="Message/Question" rows="5" required></textarea>
<input type="hidden" name="mailto" value="#items[1].values.email#">
</div>
</div>
<div class="row">
<div class="large-12 columns">
<button type="submit" class="tiny right">Submit</button>
</div>
</div>
</div>
</div>
</div>
</div>