Contact form submit error - php

Question

I've got a simple contact form set up, but am having a little trouble with the finishing touches. I'm getting an error message whenever the form is submitted. Was hoping someone can take a look at my code and point out my mistake. Thanks!
(edited) Forgot to mention the error is that once form is submitted, I am being redirected to the error page (error.html) instead of the success (contactthanks.php) page.
HTML:
<form method="post" action="contactengine.php">
<label for="Name">Name:</label>
<input type="text" name="Name" id="Name" />
<label for="City">City:</label>
<input type="text" name="City" id="City" />
<label for="Email">Email:</label>
<input type="text" name="Email" id="Email" />
<label for="Message">Message:</label><br />
<textarea name="Message" rows="20" cols="20" id="Message"></textarea>
<input type="submit" name="submit" value="Submit" class="submit-button" />
</form>
PHP:
<?php
$EmailFrom = "";
$EmailTo = "MYEMAIL#gmail.com";
$Subject = "";
$Name = Trim(stripslashes($_POST['Name']));
$Tel = Trim(stripslashes($_POST['Tel']));
$Email = Trim(stripslashes($_POST['Email']));
$Message = Trim(stripslashes($_POST['Message']));
$validationOK=true;
if (!$validationOK) {
print "<meta http-equiv=\"refresh\" content=\"0;URL=error.html\">";
exit;
}
$Body = "";
$Body .= "Name: ";
$Body .= $Name;
$Body .= "\n";
$Body .= "Tel: ";
$Body .= $Tel;
$Body .= "\n";
$Body .= "Email: ";
$Body .= $Email;
$Body .= "\n";
$Body .= "Message: ";
$Body .= $Message;
$Body .= "\n";
$success = mail($EmailTo, $Subject, $Body, "From: <$EmailFrom>");
if ($success){
print "<meta http-equiv=\"refresh\" content=\"0;URL=contactthanks.php\">";
}
else{
print "<meta http-equiv=\"refresh\" content=\"0;URL=error.html\">";
}
?>

Answer 1

$success = mail($EmailTo, $Subject, $Body, "From: <$EmailFrom>");
if ($success){
print "<meta http-equiv=\"refresh\" content=\"0;URL=contactthanks.php\">";
}
else{
print "<meta http-equiv=\"refresh\" content=\"0;URL=error.html\">";
}
It is redirecting to your error page because the call to mail is returning false (indicating the email was not accepted for delivery) and that is exactly what you are telling it to do in that situation.
You need to check the SMTP set up on your server.
Typically the settings to check for are sendmail_from and sendmail_path in your PHP.ini file. Seeing as you are already setting a From header, sendmail_path is likely to not be set up correctly.

Answer 2

See what's causing the problem with
ini_set("display_errors", "1");
error_reporting(E_ALL);`.
My guess is you have wrong smtp settings and mail function fails.