PHP Manual'den aldığım bir mail gönderme koduyla tek bir adrese gönderdiğim mailler Hotmail'de Önemsiz kutusuna ulaşıyor. Fakat virgülle ayırıp birden fazla gönderilecek adres yazdığımda Gelen Kutusuna gidiyor. SquirrelMail'den yolladığımda da aynı sonucu alıyorum. Sizce bu sorunun sebebi ne olabilir?

Kullandığım php kodu:

<?php

# -=-=-=- PHP FORM VARIABLES (add as many as you would like)

$name = $_POST["name"];
$email = $_POST["email"];
$invoicetotal = $_POST["invoicetotal"];

# -=-=-=- MIME BOUNDARY

$mime_boundary = "----Your_Company_Name----".md5(time());

# -=-=-=- MAIL HEADERS

$to = "$email";
$subject = "This text will display in the email's Subject Field";

$headers = "From: Our Company <company@ourcompany.com>\n";
$headers .= "Reply-To: Our Company <company@ourcompany.com>\n";
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-Type: multipart/alternative; boundary=\"$mime_boundary\"\n";

# -=-=-=- TEXT EMAIL PART

$message = "--$mime_boundary\n";
$message .= "Content-Type: text/plain; charset=UTF-8\n";
$message .= "Content-Transfer-Encoding: 8bit\n\n";

$message .= "$name:\n\n";
$message .= "This email is to confirm that \"Our Company\" has received your order.\n";
$message .= "Please send payment of $invoicetotal to our company address.\n\n";
$message .= "Thank You.\n\n";

# -=-=-=- HTML EMAIL PART
 
$message .= "--$mime_boundary\n";
$message .= "Content-Type: text/html; charset=UTF-8\n";
$message .= "Content-Transfer-Encoding: 8bit\n\n";

$message .= "<html>\n";
$message .= "<body style=\"font-family:Verdana, Verdana, Geneva, sans-serif; font-size:14px; color:#666666;\">\n";
$message .= "$name:<br>\n";
$message .= "<br>\n";
$message .= "This email is to confirm that \"Our Company\" has received your order.<br>\n";
$message .= "Please send payment of $invoicetotal to our company address.<br>\n\n";
$message .= "<br>\n";
$message .= "Thank You.<br>\n\n";
$message .= "</body>\n";
$message .= "</html>\n";

# -=-=-=- FINAL BOUNDARY

$message .= "--$mime_boundary--\n\n";

# -=-=-=- SEND MAIL

$mail_sent = @mail( $to, $subject, $message, $headers );
echo $mail_sent ? "Mail sent" : "Mail failed";

?>
NOT: Sunucu ip adresi için PTR kaydı ve domain için SPF kaydı yapıldı, o yönden bir sorun yok.