Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm trying to send email from postfix to different providers: Hotmail OK, Yahoo Not tested, Italian Provider OK, GMAIL KO !

I have SPF and rDNS set correctly ... this is the header:

Received: by with SMTP id lp2csp107348obb;
        Thu, 16 Aug 2012 10:28:50 -0700 (PDT)
Received: by with SMTP id v17mr1084539wen.1.1345138129729;
        Thu, 16 Aug 2012 10:28:49 -0700 (PDT)
Return-Path: <>
Received: from ( [*.*.*.*])
        by with ESMTP id a27si7050105wej.31.2012.;
        Thu, 16 Aug 2012 10:28:49 -0700 (PDT)
Received-SPF: pass ( domain of designates *.*.*.* as permitted sender) client-ip=*.*.*.*;
Authentication-Results:; spf=pass ( domain of designates *.*.*.* as permitted sender)
Received: from localhost (localhost [])
    by (Postfix) with ESMTP id 6A92076716
    for <>; Thu, 16 Aug 2012 19:28:48 +0200 (CEST)
To: =?utf-8?B?U2VyZ2lvIEJlbGxpbmk=?= <>
Subject: =?utf-8?B?TXVyYWxlc3RvcmUuaXQgLSBDb25mZXJtYSBsJ2FjY291bnQgU2VyZ2lvIEJlbGxpbmk=?=
From: Label <>
Reply-To: Label <>
Date: Thu, 16 Aug 2012 17:28:48 +0000
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
MIME-Version: 1.0
share|improve this question

You should check your sending ip on SenderScore and check you mail with some spam score tools, also you can read Bulk Senders Guidelines written by Gmail. Almost forgot about DomainKeys Identified Mail (DKIM).

share|improve this answer
if I send the same email with the smtp of my provider, that have no SPF and no DKIM, the email goes in Inbox ! :( – Sergio Aug 17 '12 at 11:31
I think your ISP's smtp server has much more positive "history" than yours, you can check it on SenderScore project as I said. – cpt.Buggy Aug 17 '12 at 11:53
senderscore says "Insufficient Email Seen" ... i can't use DKIM because my DNS doesn't configure the record :( there are alternatives ? – Sergio Aug 17 '12 at 12:56
Just start sending and ask people to add you to contacts, maybe later your "trust" will grow. – cpt.Buggy Aug 17 '12 at 13:24

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.