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I've been struggling to figure out why this is happening, but my emails are being marked as spam by Gmail and Hotmail (they work in Yahoo.)
SPF, DKIM, rDNS, and sender-id all pass. What's weirder is I've send the EXACT same email with its exact contents from my dev server and Gmail accepts it as not spam even though every one of those checks which passes in production fails in dev. Hotmail still marks it as spam though.
Any idea what could be going on? Here is an example header from Gmail (with IPs and domains changed for privacy):
Delivered-To: [email protected]
Received: by 10.194.16.130 with SMTP id g2csp192349wjd;
Mon, 13 Aug 2012 14:04:10 -0700 (PDT)
Received: by 10.236.193.105 with SMTP id j69mr12819871yhn.21.1344891849751;
Mon, 13 Aug 2012 14:04:09 -0700 (PDT)
Return-Path: <[email protected]>
Received: from mail.mydomain.com (mydomain.com. [xxx.xxx.xxx.xxx])
by mx.google.com with ESMTPS id e22si563514yhh.132.2012.08.13.14.04.08
(version=TLSv1/SSLv3 cipher=OTHER);
Mon, 13 Aug 2012 14:04:09 -0700 (PDT)
Received-SPF: pass (google.com: domain of [email protected] designates xxx.xxx.xxx.xxx as permitted sender) client-ip=xxx.xxx.xxx.xxx;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of [email protected] designates xxx.xxx.xxx.xxx as permitted sender) [email protected]; dkim=pass [email protected]
Received: from mydomain.com (localhost [127.0.0.1])
by mail.mydomain.com (8.14.4/8.14.4/Debian-2ubuntu1) with ESMTP id q7DL48tq019625
for <[email protected]>; Mon, 13 Aug 2012 17:04:08 -0400
X-DKIM: OpenDKIM Filter v2.3.2 mail.mydomain.com q7DL48tq019625
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mydomain.com;
s=server; t=1344891848;
bh=lpw+5POmINBjQYgQBdJvY2d+m84MY8hwTqZ6riNfH8I=;
h=Date:From:To:Message-ID:Subject:Mime-Version:Content-Type:
Content-Transfer-Encoding;
b=KnYSvSzFewOGFyYWvP1DfCvyRfp6y31BfOPTOgRsZ7nGB4PXuau84euzuhs82V4lx
++DjN3iPxSj07euW+y7aRe9R2YiXKJFVNh7cbcJX8+tc3LMmnR7Cv27iP3Yvv6mQMd
uz4Engql3bXLVVDKcLLj/Fj2eiwtWzW4chA2GNTQ=
Received: (from root@localhost)
by mydomain.com (8.14.4/8.14.4/Submit) id q7DL48Dm019624
for [email protected]; Mon, 13 Aug 2012 17:04:08 -0400
Date: Mon, 13 Aug 2012 17:04:08 -0400
From: "Website" <[email protected]>
To: [email protected]
Message-ID: <[email protected]>
Subject: You've received a message from Bob.
Mime-Version: 1.0
Content-Type: text/html;
charset=UTF-8
Content-Transfer-Encoding: 7bit
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mydomain.com; q=dns/txt; s=server; t=1344891848; bh=LfadLl6eJEB+NgiTbBlcBhOt/9NKcG0wapkrAjlGqfg=; h=content-transfer-encoding:content-type:date:from:message-id:mime-version:subject:to; b=mTB8TBb+gG7ESxeVbfqHANKUMeNbdwK/hSIq58oin5ERNSMKOIvZKY9cQJRoY/Q96PQ7J+7b3ZkZuwcg+zMkQyhK7YACvFAz4SUWqpdqiZrBDw8Vqy3PjkGFcz2V5vyUOjI6vN/Y6iOj1zlocC+/p8lkpw3upwxr7cNoe5/Kwu8=
847
DMARC uses SPF and DKIM and provides a set of instructions to receiving email servers with what to do if they receive unauthenticated mail. Now that you have an overview of these three valuable email authentication tools, let's dive into how each component works.
SPF: Specifies the servers and domains that are authorized to send email on behalf of your organization. DKIM: Adds a digital signature to every outgoing message, which lets receiving servers verify the message actually came from your organization.
DKIM stands for Domain Keys Identified Mail. DKIM is a stronger authentication method than SPF since it uses public-key cryptography instead of IP addresses. When using DKIM, a sender can attach DKIM signatures to email headers and validate them using a public cryptographic key found in the company's DNS record.
Summing Up. In a nutshell, SPF allows email senders to define which IP addresses are allowed to send mail for a particular domain. DKIM on the other hand, provides an encryption key and digital signature that verifies that an email message was not forged or altered.
The other guy doesn't know what he's talking about and just guessing.
'Received: (from root@localhost)' is your problem. That needs to reflect the from email...
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