php sending mail problem,processing this code display msg success but i can't get any mail in my mail id.

Question

<form action="mail.php" method="post">
<div class="form-group">
<input type="text" class="form-control" placeholder="Your Name" name="name" id="name"
required>
</div>
<div class="form-group">
<input type="text" class="form-control" placeholder="Company Name" name="cname" id="cname"
required>
</div>
<div class="form-group">
<input type="email" class="form-control" placeholder="email" name="email" id="email"
required>
</div>
<div class="form-group">
<input type="text" class="form-control" placeholder="Phone No" name="phone" id="phone"
required>
</div>
<div class="form-group">
<input type="text" class="form-control" placeholder="Address" name="address" id="address"
required>
</div>
<div class="form-group">
<input type="text" class="form-control" placeholder="subject" name="subject" id="subject"
required>
</div>
<div class="form-group">
<input type="textarea" class="form-control" name="message" id="message"
placeholder="Requirements & Description" name="subject" id="subject" required>
</div>

<div class="form-group text-right">
<button
class="btn btn-rounded btn-primary">send message</button>
</div>
</form>

Answer 1

//this is mail.php file
<?php
$to = '[e-mail]';
$firstname = $_POST["name"];
$Cname = $_POST["cname"];
$email = $_POST["email"];
$phone = $_POST["phone"];
$address = $_POST["address"];
$message = $_POST["message"];
$textp = $_POST["subject"];

$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= "From: " . $email . "\r\n"; // Sender's E-mail
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

$message ='<table style="width:100%">
<tr>
<td>'.$firstname.'</td>
</tr>
<tr><td>Company Name: '.$Cname.'</td></tr>
<tr><td>Email: '.$email.'</td></tr>
<tr><td>phone: '.$phone.'</td></tr>
<tr><td>Adress: '.$address.'</td></tr>
<tr><td>Text: '.$textp.'</td></tr>
<tr><td>Message: '.$message.'</td></tr>

</table>';

if (@mail($to, $email, $message, $headers))
{
echo 'The message has been sent.';
}else{
echo 'failed';
}

?>