Contact form – how to get subject line displayed in received e-mail

Hey there,

Do you know how to get the subject line being displayed in the received message (subject is not required) I have this code in my contact page template:

if($_POST[sent]){
 $error = "";
 if(!trim($_POST[your_name])){
 $error .= "<p>Please enter your name</p>";
 }
 if(!filter_var(trim($_POST[your_email]),FILTER_VALIDATE_EMAIL)){
 $error .= "<p>Please enter a valid email address</p>";
 }
 if(!trim($_POST[your_message])){
 $error .= "<p>Please enter a message</p>";
 }
 if(!$error){
 $email = wp_mail(get_option("admin_email"),trim($_POST[your_name])." sent a message from ".get_option("blogname"), stripslashes(trim($_POST[your_message])),"From: ".trim($_POST[your_name])." <".trim($_POST[your_email]).">\r\nReply-To:".trim($_POST[your_email]));
 }
}

and this is the form:

?php if($email){ ?>
 <p><strong>Message sent. Thank you.</strong></p>
 <?php } else { if($error) { ?>
 <p><strong>Your message has not been sent</strong><p>
 <?php echo $error; ?>
 <?php } else { the_content(); } ?>
 <form action="<?php the_permalink(); ?>" id="contact_me" method="post">
 <input type="hidden" name="sent" id="sent" value="1" />
 <div id="form">
 <div id="label">Name*</div>
 <div id="input-field"><input type="text" name="your_name" id="your_name" value="<?php echo $_POST[your_name];?>" /></div>
 <div id="label">e-mail*</div>
 <div id="input-field"><input type="text" name="your_email" id="your_email" value="<?php echo $_POST[your_email];?>" /></div>
 <div id="lebel">Subject</div>
 <div id="input-field"><input type="text" name="your_subject" id="your_subject" value="<?php echo $_POST[your_subject];?>" /></div>
 </div>

I would like to have the e-mails that I will received look something like

[name] sent you a message from blog (as the header)

Subject:
(and message below)