make the Submit button action

Relatively new to all this but I need some assisance on the Submit Button.

Got hte following code;

</div>
<div class="row">
<div class="col-md-8">
<form class="form">
<div class="row">
<div class="name col-md-4">
<input type="text" name="name" id="name" placeholder="Name" />
</div>
<div class="email col-md-4">
<input type="text" name="email" id="email" placeholder="Email" />
</div>
<div class="subject col-md-4">

<input type="text" name="subject" id="subject" placeholder="Subject" />
</div>
</div>
<div class="row">
<div class="text col-md-12">
<textarea name="text" placeholder="Message"></textarea>
</div>
</div>
<div class="submit">
<input name="Submit" type="submit" value="Send Now" />
</div>
</form>
</div>

I am not sure how I make it take the name, email address, subject and message and email it to the hosting company. Appreciate any help, thanks.