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Received: by with SMTP id ml15cs152516qcb;
        Tue, 9 Aug 2011 05:22:45 -0700 (PDT)

Received: by with SMTP id u17mr6831320ybn.198.1312892565452;
        Tue, 09 Aug 2011 05:22:45 -0700 (PDT)

Return-Path: <xxxxx@xxxxxxxxx>

Received: from ( [])
        by with ESMTP id g4si5211294ybi.22.2011.;
        Tue, 09 Aug 2011 05:22:44 -0700 (PDT)

Received-SPF: pass ( domain of xxxxx@xxxxxxxxx designates as permitted sender);

Authentication-Results:; spf=pass ( domain of xxxxx@xxxxxxxxx designates as permitted sender) smtp.mail=xxxxx@xxxxxxxxx; dkim=pass

Received: from (xxxxxxxxxxxxxxx.xxxxxxxxxxxxxxx [])
    by (Postfix) with ESMTPA id 02C12B543AE
    for <>; Tue,  9 Aug 2011 09:22:42 -0300 (BRT)

DomainKey-Signature: a=rsa-sha1; s=mail;; c=simple; q=dns;

DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple;;
    s=mailk; t=1312892562;

Date: Tue, 9 Aug 2011 09:22:42 -0300

To: xxxxx@xxxxxxxxx

From: xxxxx <xxxxx@xxxxxxxxx>

Reply-to: xxxxx <xxxxx@xxxxxxxxx>

Subject: =?iso-8859-1?Q?Reuni=E3o_de_professores_na_escola?=

Message-ID: <b8b16385ed9c0141365ee6257a39d284@xxxxx>

X-Priority: 3

X-Mailer: PHPMailer 5.2 (

MIME-Version: 1.0

Content-Type: multipart/alternative;

Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 8bit

Teremos reunião na escola a noite, favor comparecer. obrigado.

Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 8bit

<table border="0" cellpadding="0" cellspacing="0" width="100%">
<table align="center" border="0" cellpadding="0" cellspacing="0" width="550">
<td bgcolor="#052444">
<table align="center" border="0" cellpadding="0" cellspacing="0" width="510">
<font color="#FFFFFF" face="Arial" size="2"><b><a href="xxxxxxxxx" target="_blank" style="color:#FFFFFF; text-decoration:none;">Teremos reunião na escola a noite, favor comparecer. obrigado.</a></b></font>


Mail always to Gmail and Yahoo always go to spam.

The server is dedicated and it's not blacklisted.

Perhaps it could be some postfix config?

share|improve this question
Always a joy to reading obfuscated headers... – andol Aug 9 '11 at 12:38

It's almost certainly the fact that the body of the e-mail is very short, and the subject is gobbledygook to a English based spam filter.

Subject: =?iso-8859-1?Q?Reuni=E3o_de_professores_na_escola?=
share|improve this answer
+1 and the HTML body probably isn't helping either. – gravyface Aug 9 '11 at 12:41
u mean that subject doesn't match with body contents? – ubunpstfix Aug 9 '11 at 12:43
@ubunpstfix, The subject contains 11 "non-normal" characters ("=", "?", and "_") that would cause my spam filters to go crazy; I imagine Google's filters are similar. I know it's an international encoding; but most spam filters aren't terribly smart. – Chris S Aug 9 '11 at 12:45
And it is from Brazil. Probably on some blacklists. But without knowing the IP... – mailq Aug 9 '11 at 12:48
@Gravyface; it's valid/standard international encoding, just most spam filters don't recognize that. – Chris S Aug 9 '11 at 17:06

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