I configured my server and well authenticate email system with DKIM key, SPF record and PTR records, when i start to sent out mails from phplist interface to my users ~50000, my domain is spammed by google. In headers, signed by and mailed by tag shows by my domain : appmail.co,

I also test my domain via check mail provide by port25, report is:

This message is an automatic response from Port25's authentication verifier service at verifier.port25.com. The service allows email senders to perform a simple check of various sender authentication mechanisms. It is provided free of charge, in the hope that it is useful to the email community. While it is not officially supported, we welcome any feedback you may have at .

Thank you for using the verifier,

The Port25 Solutions, Inc. team

==========================================================

Summary of Results

SPF check:          pass
DomainKeys check:   neutral
DKIM check:         pass
Sender-ID check:    pass
SpamAssassin check: ham

==========================================================

Details:

HELO hostname:  app.appmail.co
Source IP:      108.179.192.148
mail-from:      [email protected]

SPF check details:

Result:         pass 
ID(s) verified: [email protected]
DNS record(s):
    appmail.co. SPF (no records)
    appmail.co. 14400 IN TXT "v=spf1 +a +mx +ip4:108.179.192.148 ?all"
    appmail.co. 14400 IN A 108.179.192.148

DomainKeys check details:

Result:         neutral (message not signed)
ID(s) verified: [email protected]
DNS record(s):

DKIM check details:

Result:         pass (matches From: [email protected])
ID(s) verified: header.d=appmail.co
Canonicalized Headers:
    content-type:multipart/alternative;'20'boundary=047d7b2eda75d8544d04c17b6841'0D''0A'
    to:[email protected]'0D''0A'
    from:shashank'20'sharma'20'<[email protected]>'0D''0A'
    subject:Test'0D''0A'
    message-id:<CADnDhbH9aDBk3Ho2-CrG7gwOoD6RNX0sFq4bWL64+kmo=9HjWg@mail.gmail.com>'0D''0A'
    date:Sat,'20'2'20'Jun'20'2012'20'16:44:50'20'+0530'0D''0A'
    mime-version:1.0'0D''0A'
    dkim-signature:v=1;'20'a=rsa-sha256;'20'q=dns/txt;'20'c=relaxed/relaxed;'20'd=appmail.co;'20's=default;'20'h=Content-Type:To:From:Subject:Message-ID:Date:MIME-Version;'20'bh=GS6uwlT+weKcrrLJ2I+cjBtWPq9nvhwRlNAJebOiQOk=;'20'b=;

Canonicalized Body:
    --047d7b2eda75d8544d04c17b6841'0D''0A'
    Content-Type:'20'text/plain;'20'charset=UTF-8'0D''0A'
    '0D''0A'
    Hello'20'Senders'0D''0A'
    '0D''0A'
    --047d7b2eda75d8544d04c17b6841'0D''0A'
    Content-Type:'20'text/html;'20'charset=UTF-8'0D''0A'
    '0D''0A'
    Hello'20'Senders'0D''0A'
    '0D''0A'
    --047d7b2eda75d8544d04c17b6841--'0D''0A'


DNS record(s):
    default._domainkey.appmail.co. 14400 IN TXT "v=DKIM1; k=rsa;
p=MHwwDQYJKoZIhvcNAQEBBQADawAwaAJhALGCOdMeZRxRHoatH7/KCvI1CKS0wOOsTAq0LLgPsOpMolifpVQDKOWT2zq/6LHVmDVjXLbnWO2d4ry/riy7ei66pLpnAV5ceIUSjBRusI8jcF9CZhPrh/OImsKVUb9ceQIDAQAB;"

NOTE: DKIM checking has been performed based on the latest DKIM specs (RFC 4871 or draft-ietf-dkim-base-10) and verification may fail for older versions. If you are using Port25's PowerMTA, you need to use version 3.2r11 or later to get a compatible version of DKIM.

Sender-ID check details:

Result:         pass 
ID(s) verified: [email protected]
DNS record(s):
    appmail.co. SPF (no records)
    appmail.co. 14400 IN TXT "v=spf1 +a +mx +ip4:108.179.192.148 ?all"
    appmail.co. 14400 IN A 108.179.192.148

SpamAssassin check details:

SpamAssassin v3.3.1 (2010-03-16)

Result:         ham  (-0.1 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
-0.0 T_RP_MATCHES_RCVD      Envelope sender domain matches handover relay
                            domain
 0.0 HTML_MESSAGE           BODY: HTML included in message
-0.5 BAYES_05               BODY: Bayes spam probability is 1 to 5%
                            [score: 0.0288]
-0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from author's
                            domain
 0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily valid
-0.1 DKIM_VALID             Message has at least one valid DKIM or DK signature
 0.5 SINGLE_HEADER_1K       A single header contains 1K-2K characters

==========================================================

Original Email

Return-Path: <[email protected]>
Received: from app.appmail.co (108.179.192.148) by verifier.port25.com id hp7qqo11u9cc for <[email protected]>; Sat, 2 Jun 2012 07:14:52 -0400 (envelope-from <[email protected]>)
Authentication-Results: verifier.port25.com; spf=pass [email protected]
Authentication-Results: verifier.port25.com; domainkeys=neutral (message not signed) [email protected]
Authentication-Results: verifier.port25.com; dkim=pass (matches From: [email protected]) header.d=appmail.co
Authentication-Results: verifier.port25.com; sender-id=pass [email protected]
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=appmail.co; s=default; h=Content-Type:To:From:Subject:Message-ID:Date:MIME-Version; bh=GS6uwlT+weKcrrLJ2I+cjBtWPq9nvhwRlNAJebOiQOk=;b=pNw3UQNMoNyZ2Ujv8omHGodKVu/55S8YdBEsA5TbRciga/H7f+5noiKvo60vU6oXYyzVKeozFHDoOEMV6m5UTgkdBefogl+9cUIbt5CSrTWA97D7tGS97JblTDXApbZH;
Received: from mail-pb0-f46.google.com ([209.85.160.46]:57831)
    by app.appmail.co with esmtpa (Exim 4.77)
    (envelope-from <[email protected]>)
    id 1SamIF-00055f-Om
    for [email protected]; Sat, 02 Jun 2012 16:44:51 +0530
Received: by pbbrp8 with SMTP id rp8so4165728pbb.5
    for <[email protected]>; Sat, 02 Jun 2012 04:14:51 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.68.216.33 with SMTP id on1mr19414885pbc.105.1338635690988;
 Sat, 02 Jun 2012 04:14:50 -0700 (PDT)
Received: by 10.143.66.13 with HTTP; Sat, 2 Jun 2012 04:14:50 -0700 (PDT)
Date: Sat, 2 Jun 2012 16:44:50 +0530
Message-ID: <CADnDhbH9aDBk3Ho2-CrG7gwOoD6RNX0sFq4bWL64+kmo=9HjWg@mail.gmail.com>
Subject: Test
From: shashank sharma <[email protected]>
To: [email protected]
Content-Type: multipart/alternative; boundary=047d7b2eda75d8544d04c17b6841
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname - app.appmail.co
X-AntiAbuse: Original Domain - verifier.port25.com
X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse: Sender Address Domain - appmail.co

--047d7b2eda75d8544d04c17b6841
Content-Type: text/plain; charset=UTF-8

Hello Senders

--047d7b2eda75d8544d04c17b6841
    Content-Type: text/html; charset=UTF-8

Hello Senders

--047d7b2eda75d8544d04c17b6841--

I also tried to send mail on yahoo , rediff but i get mails in spam. Please help me to sort out this issue