Hi, I've got server with IspConfig with multiple domain name. Problem is all email sent from website form's has Invalid Return-Path. It is look like : firstname.lastname@example.org. This is considere as spam. Because SPF does not designate permitted sender hosts. I was thinking problem come from ServerAdmin directive from vhost file in sites-enabled directories. But I recently update the template. Now ServerAdmin directive is set with the correct email address. I restart Apache and serveur but invalid Return-Path is still appear on the email header. Do you know how can I set Return-Path from email sent by form's website with correct email address ? This is email header received in the spam folder from Gmail (Also : Yahoo, Hotmail ...). : HTML: Delivered-To: email@example.com Received: by 10.42.148.199 with SMTP id s7csp698826icv; Wed, 29 Oct 2014 08:14:40 -0700 (PDT) X-Received: by 10.180.99.105 with SMTP id ep9mr13519175wib.82.1414595679468; Wed, 29 Oct 2014 08:14:39 -0700 (PDT) Return-Path: <firstname.lastname@example.org> Received: from myservername.tld (myservername.tld. [188.8.131.52]) by mx.google.com with ESMTPS id r8si6916627wix.42.2014.10.29.08.14.39 for <email@example.com> (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 29 Oct 2014 08:14:39 -0700 (PDT) Received-SPF: none (google.com: firstname.lastname@example.org does not designate permitted sender hosts) client-ip=184.108.40.206; Authentication-Results: mx.google.com; spf=neutral (google.com: email@example.com does not designate permitted sender hosts) firstname.lastname@example.org; dmarc=fail (p=NONE dis=NONE) header.from=yahoo.fr Received: from localhost (unknown [127.0.0.1]) by myservername.tld (Postfix) with ESMTP id EFCA5137625F for <email@example.com>; Wed, 29 Oct 2014 16:20:21 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at myservername.tld Received: from myservername.tld ([127.0.0.1]) by localhost (myservername.tld [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bzhVJlvRS7H5 for <firstname.lastname@example.org>; Wed, 29 Oct 2014 16:20:14 +0100 (CET) Received: by myservername.tld (Postfix, from userid 5029) id 175A31376260; Wed, 29 Oct 2014 16:20:14 +0100 (CET) To: email@example.com Subject: =?UTF-8?Q?Message_formulaire_du_site_cr=C3=?= X-PHP-Originating-Script: 5029:class-phpmailer.php Date: Wed, 29 Oct 2014 15:20:14 +0000 From: WordPress <firstname.lastname@example.org> Message-ID: <email@example.com> X-Priority: 3 X-Mailer: PHPMailer 5.2.7 (https://github.com/PHPMailer/PHPMailer/) MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Thank you.