Re: [Asrg] What are the IPs that sends mail for a domain?

SM <> Tue, 16 June 2009 23:02 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 2253D3A6C7A for <>; Tue, 16 Jun 2009 16:02:24 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -2.702
X-Spam-Status: No, score=-2.702 tagged_above=-999 required=5 tests=[AWL=-0.103, BAYES_00=-2.599]
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id 5QlRAK6EZwFN for <>; Tue, 16 Jun 2009 16:02:23 -0700 (PDT)
Received: from ( []) by (Postfix) with ESMTP id 3CF1B3A6C6B for <>; Tue, 16 Jun 2009 16:02:23 -0700 (PDT)
Received: from ([]) (authenticated bits=0) by (8.14.4.Alpha0/8.14.4.Alpha0) with ESMTP id n5GN2PtY007639 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for <>; Tue, 16 Jun 2009 16:02:31 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple;; s=mail; t=1245193353; x=1245279753; bh=4NU92sAg2ljRuVu58ZtxzA6zFvzKh4qCe+D+Qf2qlh0=; h=Message-Id:Date:To:From:Subject:In-Reply-To:References: Mime-Version:Content-Type:Cc; b=zsmmLCUAxNUJaQ9oYRItRibzuIfGxE0evlCfKWYBdtr0682p4Ci+Q3thZdJigYhIn 6OydQeY83PJt6jxqlweZSbdQ6wWqqZRc7pkzGba9GqoZeohar14efKf38ob8ovn5lR k1Ppx6Gimfsrk8nVsDUSJsbZsY5jhaqJ6waLfS/U=
DomainKey-Signature: a=rsa-sha1; s=mail;; c=simple; q=dns; b=TNX3HXwq/ADcwjoZ1TusxVgz80329h/iyYy1DEwxG/SzrNjj7JXXfOetBMwVC0e+2 7Ka1x4hCk4pmTYBVJy9qAMHABVl9CgmkhvuFjpVnpFa22nxn+JL1bIp5tQyDuA7Fi2P BmP8L+G0/5VcJmTwwNK4SJpUEfNggVGT7BJA5yo=
Message-Id: <>
X-Mailer: QUALCOMM Windows Eudora Version
Date: Tue, 16 Jun 2009 16:01:25 -0700
To: Anti-Spam Research Group - IRTF <>
From: SM <>
In-Reply-To: <9112777.1871245190785748.JavaMail.franck@iphone-4.genius.l ocal>
References: <4515812.1851245190668283.JavaMail.franck@iphone-4.genius.local> <9112777.1871245190785748.JavaMail.franck@iphone-4.genius.local>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed
Subject: Re: [Asrg] What are the IPs that sends mail for a domain?
X-Mailman-Version: 2.1.9
Precedence: list
Reply-To: Anti-Spam Research Group - IRTF <>
List-Id: Anti-Spam Research Group - IRTF <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Tue, 16 Jun 2009 23:02:24 -0000

At 15:20 16-06-2009, Franck Martin wrote:
>I have a mail server and one of my users complains he is not 
>receiving emails from a domain. How do I find if I have blocked the 
>domain from sending to my server. Meaning, knowing the domain name 
>of the sender, how do I find the IPs from where the mail could be 
>sent from. It seems that SPF is the only tool to provide that answer?

You can use the mail log to track down whether you blocked the 
domain.  The information might not be available if you are blocking 
by IP address.  You could also contact the postmaster at the other end.