Simple Contact PHP not sending - php

Question

I am very new to PHP, I had this working on a windows server, But just recently migrated to a LINUX server and now the form shows as its sending but nothing is coming through? Any help would be greatly appreciated,, Thanks
HTML
<div class="wrapper">
<div id="contact_form">
<form action="html_form_send.php" method="POST">
<label>
<span>Name*:</span>
<br>
<input type="text" placeholder="Please enter your name" name="name" id="name" required autofocus>
</label>
<label>
<span>Phone:</span>
<input type="text" placeholder="Please enter your phone" name="phone" id="phone">
</label>
<label>
<span>Email*:</span>
<input type="email" placeholder="youremail#gmail.com" name="email" id="email" required>
</label>
<label>
<span>Message*:</span>
<input name="message" type="text" required id="message" placeholder="Message" value="">
</label>
<input class="sendButton" type="submit" name="Submit" value="Send">
</form>
</div>
PHP
<?php
$name = $_POST['name'];
$email = $_POST['email'];
$phone= $_POST['phone'];
$message = $_POST['message'];
$formcontent="From: $name \n Phone:
$phone \n
Email:
$email \n
Message:
$message \n";
$recipient = "dudetotal#gmail.com";
$subject = "Design Contact";
$mailheader = "From: $email \n";
mail($recipient, $subject,$formcontent, $mailheader) or die("Error!");header("Location: http://website.com/website.com/success.html");
?>
suggestions?

Answer 1

You should use ternary operators, and validate based on the value:
$name = isset($_POST['name']) ? $_POST['name'] : ""; // don't forget to sanitize
if ($name != "") {
// do logic
}
Also, it's pointless to have a header() after the die() statement as the die() statement will end all further execution.
If the email is still not sending, your mail configuration may not be set up properly.
Edit: also look into sanitization. Here is a link to get you started with it.

Answer 2

You can do something like this.
if ($_POST['name'] && $_POST['email'] && $_POST['phone'] && $_POST['message']) {
// your email sending logic is here:
} else {
echo "All fields are required..
}