Change email headers on php send mail - php

Question

I want to change my email headers on php mail send function , but i cant do this , i try use this into my php.ini
sendmail_path = /usr/sbin/sendmail -t -i -f'user#domain.com'
but its not working , i use plesk .
then i try to change my php script and add headers Parameter into my php code [ im new at php and using someone's script on internet ] but its not working , i means the mail not sending ..
php send mail script with out any change work correctly and send email
<?php
$emailTo = "user#domain.com";//change this to the email address which should receive the form data
/*
NOTE: do not change anything below this
*/
if( isset($_POST['maximus']) ) {
//honey pot detection
if( $_POST['maximus'] != '' ) {
die('Bad spam bot!!');
}
$message = "";
foreach( $_POST as $field => $val ) {
if( $field != 'maximus' ) {
$message .= $field . " : ". $val . "\n";
}
}
$subject = $_POST['theSubject'];
//send the email
if( mail($emailTo, $subject, $message) ) {
echo "Message sent!";
} else {
echo "Could not send message";
}
}
?>
but when i add headers parameter into my code the mail not sending
<?php
$emailTo = "user#domain.com";//change this to the email address which should receive the form data
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
// More headers
$headers .= 'From: <webmaster#example.com>' . "\r\n";
/*
NOTE: do not change anything below this
*/
if( isset($_POST['maximus']) ) {
//honey pot detection
if( $_POST['maximus'] != '' ) {
die('Bad spam bot!!');
}
$message = "";
// Always set content-type when sending HTML email
foreach( $_POST as $field => $val ) {
if( $field != 'maximus' ) {
$message .= $field . " : ". $val . "\n";
}
}
$subject = $_POST['theSubject'];
//send the email
if( mail($emailTo, $subject, $message, $headers) ) {
echo "Message sent!";
} else {
echo "Could not send message";
}
}
?>
html form :
<form data-toggle="validator" method="post" action="form.php" id="quickQuoteForm" class="aSubmit">
<div style="display:none"><input type="text" name="maximus" value=""></div>
<input type="hidden" name="subject" value="Blue: Quick Quote Request">
<div class="contact-form-small">
<div class="row">
<div class="col-xs-12 col-md-6">
<div class="form-group">
<input type="text" placeholder="First and Last Name *" aria-invalid="false" aria-required="true" size="40" value="" name="name" required>
</div>
<div class="form-group">
<input type="email" placeholder="E-mail address" aria-invalid="false" aria-required="true" size="40" value="" name="email" required>
</div>
<select aria-invalid="false" name="service">
<option value="Cargo">Cargo</option>
<option value="Ground Transport">Ground Transport</option>
<option value="Logistic Service">Logistic Service</option>
<option value="Storage">Storage</option>
<option value="Trucking Service">Trucking Service</option>
<option value="Warehousing">Warehousing</option>
</select>
</div>
<div class="col-xs-12 col-md-6">
<div class="form-group">
<input type="text" placeholder="Subject *" aria-invalid="false" aria-required="true" size="40" value="" name="subject" required>
</div>
<div class="form-group">
<textarea placeholder="Message *" aria-invalid="false" rows="10" cols="40" name="message" required></textarea>
</div>
</div>
<div class="col-xs-12 col-md-12">
<input type="submit" class="btn btn-primary pull-right" value="SEND MESSAGE">
<img class="ajax-loader" id="loader" src="images/ajax-loader.gif" alt="Sending ..." style="display:none;">
</div>
</div><!-- /.row -->
<div class="response success">Your message was sent; we'll be in touch shortly!</div>
<div class="response error">Unfortunately, we could not sent your message right now. Please try again.</div>
</div><!-- /.contact-form-small -->
</form>
i see this part of code NOTE: do not change anything below this but i really need to change my headers name ..