Empty email reception

hi, I have bought a theme , and the forms are not well programed. I get empty emails with just the fields. This is once of the contact forms

<div class="stm-form-with-icon">
   <i class="stm-service-icon-write_message"></i>[textarea* message placeholder "Your Message"]
</div>

<div class="stm-form-with-icon">
   <i class="stm-service-icon-user-2"></i>[text* your name placeholder "First Name, Your Last Name*"]
</div>

<div class="stm-form-with-icon">
   <i class="stm-service-icon-mail-o"></i>[email* email placeholder "Your Email Address*"]
</div>

<div class="stm-form-with-icon">
   <i class="stm-service-icon-pin_2"></i>[text* zip placeholder "Zip Code*"]
</div>

<div class="stm-form-with-icon">
   <i class="stm-service-icon-phone"></i>[tel* tel placeholder "Your Phone"]
</div>

[submit "Send message"]

To	
<[email protected]>
From	
<[email protected]>
Subject	
Message from [your name]
Additional headers	
Message body	
From: [your name] <[your email]>
Subject: [your subject]

Message Body:
[your message]

thanks for your help