i dont recieve a mail from my email form [duplicate] - php

Question

This question already has answers here:
PHP mail function doesn't complete sending of e-mail
(31 answers)
Closed 7 years ago.
So everything works except that I don't receive an email after sending and wonder why?
keeps getting this error "Could not execute mail delivery program '/usr/local/bin/sendmail -oi -t' in"
Html
<form action="process.php" method="post">
<ul>
<li>
<label for="name">Name:</label>
<input type="text" name="name" id="name" />
</li>
<li>
<label for="email">Email:</label>
<input type="text" name="email" id="email" />
</li>
<li>
<label for="topic">Topic:</label>
<select>
<option value="optiona">optiona</option>
<option value="optionb">optionb</option>
<option value="optionc">optionc</option>
</select>
</li>
<li>
<label for="message">your message:</label>
<textarea id="message" name="message" cols="42" rows="9"></textarea>
</li>
<li><input type="submit" value="Submit"></li>
</form>
PHP
<?php
$to = 'robin.kahrle#gmail.com';
$subject='hi there you';
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$message = <<<EMAIL
Hi! My name is $name.
$message
From $name
my email is $email
EMAIL;
$header ='$email';
if($_POST){
mail($to, $subjects, $message, $header);
$feedback = 'Thankyou for your email';
echo $feedback;
}
?>

Answer 1

Maybe your $header and $message definition is not ok. Try this:
<?php
// Constants
$to = 'robin.kahrle#gmail.com';
$subject='hi there you';
// Variable contents from the form
$name = (!empty($_POST['email'])) ? $_POST['name'] : '????';
$email = (!empty($_POST['email'])) ? $_POST['email'] : $to;
$message = 'Hi? my name is ' . $name;
if (!empty($_POST['message'])) $message .= . "\r\n" . $_POST['message'];
// Header
$header = 'From: ' . $email . "\r\n" .
'Reply-To: webmaster#example.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
// Send mail and give feedback
$accepted = mail($to, $subjects, $message, $header);
if ($accepted) {
$feedback = 'Thankyou for your email';
} else {
$feedback = 'Email not accepted';
}
echo $feedback;