<div class="form-group">
<label class="col-sm-3 control-label">Email <span class="required">*</span></label>
<div class="col-sm-9">
<div class="input-group">
<span class="input-group-addon">
<i class="fa fa-envelope"></i>
</span>
<input type="email" name="email" class="form-control" placeholder="eg.: email@email.com" required/>
</div>
</div>
</div>