Re: Signature from a particular email provider failing

From: feisar <f3isar_at_googlemail.com>
Date: Sun, 23 May 2010 19:28:57 +0100

> I've emailed Bluebottle to ask if there's a way for us to get the sample
> data we need to identify the problem. I'll let you know if/when they
> reply.
>
> -MSK

Thanks for the reply, I did email Bluebottle last week regarding this
issue but have had no response, hopefully you will get a reply. I was
not very assertive about something needing to be done as (being new to
DKIM) I was not sure if my set up was partly to blame.

To get a proper look at Bluebottle's headers I removed DKIM checking
on my server and repeated the sending of mail from Bluebottle to one
recipient and then to two (I have edited sensitive info and replaced .
with [dot] but left the formatting exactly the same):

1.

Return-Path: <user.name_at_bluebottle[dot]com>
 Delivered-To: me_at_myserver[dot]net
 Received: from mi0.bluebottle[dot]com (mi0.bluebottle[dot]com [ip.ad.dr.ess])
         by mail.myserver[dot]net (Postfix) with ESMTP id B23183E17
         for <me_at_myserver[dot]net>; Sun, 23 May 2010 19:15:55 +0200 (CEST)
 Received: from fe1.bluebottle[dot]com (internal.bluebottle[dot]com
[ip.ad.dr.ess2])
         by mi0.bluebottle[dot]com (8.13.1/8.13.1) with ESMTP id o4NHFrm4016245
         for <me_at_myserver[dot]net>; Sun, 23 May 2010 17:15:53 GMT
 DomainKey-Signature: a=rsa-sha1; s=mail; d=bluebottle[dot]com; c=nofws; q=dns;
         h=received:dkim-signature:to:message-id:date:from:
         mime-version:content-type:content-transfer-encoding:user-agent:
         x-virus-scanned:x-virus-status:x-trusted-delivery;
         b=G2mC0WpCtnY1Kk0yYLStjl9SwBLLfVeMBGDh0bSvDOfnPAox7WDaTh4/xUGmO5Hez
         vzqFahxEWXXGfW0xsSxFi/booeEtbt9GM9fci2IC6YxklOhD1pYPvQXFji9cuPA
 Received: from localhost (internal.bluebottle[dot]com [ip.ad.dr.ess2])
         (Authenticated sender: user.name_at_bluebottle[dot]com)
         by fe1.bluebottle[dot]com (Postfix) with ESMTPA id E5F6D5C359
         for <me_at_myserver[dot]net>; Sun, 23 May 2010 17:15:52 +0000 (UTC)
 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=bluebottle.com; s=fe0;
         t=1274634952; bh=7SbDNtPomsXWDSHb6iBQT7nBLdEHVDjxpfy7dl0dx9A=; l=28;
         h=To:Message-ID:Date:From:Subject:MIME-Version:Content-Type:
          Content-Transfer-Encoding; b=KQmHiz6pZChBWIIDPSiqCATxWwVC+ept8Gmrq
         h6z/IBP+wk9lbaYqT+GL4+rnJv7I7BTnZDtIs3X7M/FcWPfdsu8NilhaP45kx86sGla
         VEpbauJ5NGgJMoPBDXkeMQ/2hoFfYcl7RQbtaEik2JD7MPHAor2xJOBnUFTYkQ1IaiQ
         =
 Received: from rip.ad.dr.ess3.in-addr.arpa
(rip.ad.dr.ess3.in-addr.arpa [ip.ad.dr.ess3])
         by mail.bluebottle[dot]com (IMP) with HTTP
         for <user.name_at_bluebottle[dot]com_at_mail.bluebottle[dot]com>;
Sun, 23 May 2010 17:15:52 +0000
 To: me_at_myserver[dot]net
 Message-ID: <1274634952.4bf962c8b1cb6_at_mail.bluebottle[dot]com>
 Date: Sun, 23 May 2010 17:15:52 +0000
 From: User <user.name_at_bluebottle[dot]com>
 Subject: Test
 MIME-Version: 1.0
 Content-Type: text/plain
 Content-Transfer-Encoding: 7bit
 User-Agent: Internet Messaging Program (IMP) 3.2.2
 X-Virus-Scanned: clamav-milter 0.96 at fe1
 X-Virus-Status: Clean
 X-Trusted-Delivery: <81a866ac6b812ca492e8a539f679da89>
 X-Length: 2205
 X-UID: 6069

2.

Return-Path: <user.name_at_bluebottle[dot]com>
 Delivered-To: me_at_myserver[dot]net
 Received: from mi0.bluebottle[dot]com (mi0.bluebottle.com [ip.ad.dr.ess])
         by mail.myserver[dot]net (Postfix) with ESMTP id 140603E96
         for <me_at_myserver[dot]net>; Sun, 23 May 2010 19:56:41 +0200 (CEST)
 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1])
         by mi0.bluebottle[dot]com (8.13.1/8.13.1) with ESMTP id o4NHue9R020803
         for <me_at_myserver[dot]net>; Sun, 23 May 2010 17:56:40 GMT
 DomainKey-Signature: a=rsa-sha1; s=mail; d=bluebottle.com; c=nofws; q=dns;
         h=received:dkim-signature:to:date:from:mime-version:
         content-type:content-transfer-encoding:user-agent:x-virus-scanned:
         x-virus-status:x-trusted-delivery;
         b=L/iaHifUK7ObitwSgnjHYIup9tlEFPWldO2TnR0lXRzgwgxe1vPtiVlxGVm5MnlxE
         6GkYGQLQFWQSLpNTPI0FGhpOuccu8cwT97sU52vCiOJ02HoxU9NsFHm5AuuYosw
 Message-Id: <201005231756.o4NHue9R020803_at_mi0.bluebottle[dot]com>
 Received: from localhost (internal.bluebottle[dot]com [ip.ad.dr.ess])
         (Authenticated sender: user.name_at_bluebottle[dot]com)
         by fe0.bluebottle[dot]com (Postfix) with ESMTPA id 00C775C161;
         Sun, 23 May 2010 17:56:39 +0000 (UTC)
 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=bluebottle.com; s=fe0;
         t=1274637400; bh=7SbDNtPomsXWDSHb6iBQT7nBLdEHVDjxpfy7dl0dx9A=; l=28;
         h=To:Message-ID:Date:From:Subject:MIME-Version:Content-Type:
          Content-Transfer-Encoding; b=j5vJ3DmqsNSptCMWp2f2Khp6GwDphOzndJHTd
         E0GllNtRr7LYuuMGV/0pA4URIJCojbAY6EwQMlrUxdO2v6p70aW5Bcp/ZVYIX7dcnf3
         3RgNTFL/9JijNdIs87Y6LBWI6EKINlghOmzDUHV+2AU9NvFSDMEjqk7Ic349T6Ub++I
         =
 Received: from rip.ad.dr.ess3.in-addr.arpa
(rip.ad.dr.ess3.in-addr.arpa [ip.ad.dr.ess3])
         by mail.bluebottle[dot]com (IMP) with HTTP
         for <user.name_at_bluebottle[dot]com_at_mail.bluebottle[dot]com>;
Sun, 23 May 2010 17:56:39 +0000
 To: me_at_myserver[dot]net, other_at_myserver[dot]net
 Date: Sun, 23 May 2010 17:56:39 +0000
 From: User <user.name_at_bluebottle[dot]com>
 Subject: Test 2
 MIME-Version: 1.0
 Content-Type: text/plain
 Content-Transfer-Encoding: 7bit
 User-Agent: Internet Messaging Program (IMP) 3.2.2
 X-Virus-Scanned: clamav-milter 0.96 at fe0
 X-Virus-Status: Clean
 X-Trusted-Delivery: <ba5dc903659f058fec7deb142cfaa575>
 X-Length: 2190
 X-UID: 6070

I notice that they are using 'simple' canonicalization and yet they
have spaces in between the comma separated list of recipients as you
said might be the case. Does it look like that is the culprit?

I guess this is one thing the automated service at port25[dot]com
could not pickup on.

I am unsure how to get the "z=" tag you mentioned,

Thanks again for the help :)
Received on Sun May 23 2010 - 18:29:13 PST