Kontakt Mail in Outlook

[NKK]

Was muss ich denn im Outlook umstellen das die Mail unterstichen ist ?

zum quelltext des mailers-

  
  
$email_adressen="[e-mail]||[e-mail]";  
$emails_in_array=explode("||",$email_adressen);  
$header = 'From:server@test'."\r\n".'Reply-To:$mail'."\r\n".'X-Mailer: PHP/'.phpversion();  
$header.="MIME-Version: 1.0\n";  
$header.="Content-Type: text/plain;\n\t charset=\"utf-8\"\n";  
$header.="Content-Transfer-Encoding: 8bit\n";  
  
foreach($emails_in_array as $email_mail)  
{  
mail("$email_mail", "Kontakt Formular von: $name", "  
Name:......... $name \r\n  
Email:........ $mail \r\n  
Telefon:...... $telefon \r\n  
Nachricht:.... $nachricht \r\n  
", "$header");