Thomas
asked on
Stuck on a DKIM Issue
Hi,
I an effort to setup a good mail service I have implemented DKIM in addition to spf.
All seemed to work fine but I have some issues with the signature and hope that maybe someone has the same issue and resolved it.
I did make lots of research and several people did indicate they had the issue but for some reason there is no definitive answer that assists me to resolve this on my system.
I run Linux RHEL 5 64bit - Sendmail - DKIM-filter
If I send a email to google it indicates "dkim=neutral (no key) header.i=@dmni.com" I tried hard but I do not understand this. I do have a private and public key and all should be there.
I do start the filter with:
dkim-filter -l -p inet:8891@localhost -b sv -c simple -d dmni.com -k /var/db/domainkeys/mail.ke y.pem -s mail -R -u dkim
the key folder and file us assigned to the user dkim
The dns has the entry:
mail._domainkey.dmni.com. 300 IN TXT v=DKIM1; g=*; k=rsa; p=MHww ... AB
Here is what google says and see below this the test at check-auth@verifier.port25 .com
Delivered-To: thomanji@gmail.com
Received: by 10.220.92.139 with SMTP id r11cs61468vcm;
Fri, 3 Jul 2009 23:43:23 -0700 (PDT)
Received: by 10.90.101.7 with SMTP id y7mr775242agb.5.1246689803 600;
Fri, 03 Jul 2009 23:43:23 -0700 (PDT)
Return-Path: <thomas@dmni.com>
Received: from app2.dmni.com (app2.dmni.com [174.143.94.154])
by mx.google.com with ESMTP id 5si10643557gxk.91.2009.07. 03.23.43.2 2;
Fri, 03 Jul 2009 23:43:22 -0700 (PDT)
Received-SPF: pass (google.com: domain of thomas@dmni.com designates 174.143.94.154 as permitted sender) client-ip=174.143.94.154;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of thomas@dmni.com designates 174.143.94.154 as permitted sender) smtp.mail=thomas@dmni.com; dkim=neutral (no key) header.i=@dmni.com
Received: from [127.0.0.1] ([120.138.81.35])
(authenticated bits=0)
by app2.dmni.com (8.13.8/8.13.8) with ESMTP id n646hTG4028468
for <thomanji@gmail.com>; Sat, 4 Jul 2009 02:43:31 -0400
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=dmni.com; s=mail;
t=1246689812; bh=VYvGzrJLAW0zN632OqvdJBG 0N7/3BUpw9 XazPKuv+wE =;
h=Message-ID:Date:From:Rep ly-To:MIME -Version:T o:Subject:
Content-Type:Content-Trans fer-Encodi ng;
b=oidJm99ubX8ljlG2e+Sla9IP 5X3ziSpIYC 03irrtyd2S RL0K2gbkgY aiFPSUr3fU q
SRuzSUl+Y98RpeRFQYwM2iEu7N khbO+v2b3W LebaLNpNig bx+8SCydR0 o41iUVW
Message-ID: <4A4EFA05.9020904@dmni.com >
Date: Sat, 04 Jul 2009 14:43:17 +0800
From: Thomas Bernthaler <thomas@dmni.com>
Reply-To: thomas@dmni.com
Organization: DMNI
User-Agent: Thunderbird 2.0.0.22 (Windows/20090605)
MIME-Version: 1.0
To: thomanji@gmail.com
Subject: test new
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
check-auth@verifier.port25 .com test:
========================== ========== ========== ========== ==
Summary of Results
========================== ========== ========== ========== ==
SPF check: pass
DomainKeys check: neutral
DKIM check: pass
Sender-ID check: pass
SpamAssassin check: ham
========================== ========== ========== ========== ==
Details:
========================== ========== ========== ========== ==
HELO hostname: app2.dmni.com
Source IP: 174.143.94.154
mail-from: thomas@dmni.com
-------------------------- ---------- ---------- ---------- --
SPF check details:
-------------------------- ---------- ---------- ---------- --
Result: pass
ID(s) verified: smtp.mail=thomas@dmni.com
DNS record(s):
dmni.com. 300 IN TXT "v=spf1 ip4:174.143.94.154 a:n2b.bullet.mail.aue.yaho o.com a:n1b.bullet.mail.aue.yaho o.com a:smtp1.tnz.mail.vip.aue.y ahoo.com a:send.tnz.yahoo.com -all"
-------------------------- ---------- ---------- ---------- --
DomainKeys check details:
-------------------------- ---------- ---------- ---------- --
Result: neutral (message not signed)
ID(s) verified: header.From=thomas@dmni.co m
DNS record(s):
-------------------------- ---------- ---------- ---------- --
DKIM check details:
-------------------------- ---------- ---------- ---------- --
Result: pass (matches From: thomas@dmni.com)
ID(s) verified: header.d=dmni.com
Canonicalized Headers:
Message-ID:'20'<4A5171B8.7 080102@dmn i.com>'0D' '0A'
Date:'20'Mon,'20'06'20'Jul '20'2009'2 0'11:38:32 '20'+0800' 0D''0A'
From:'20'Thomas'20'Berntha ler'20'<th omas@dmni. com>'0D''0 A'
Reply-To:'20'thomas@dmni.c om'0D''0A'
MIME-Version:'20'1.0'0D''0 A'
To:'20'check-auth@verifier .port25.co m'0D''0A'
Subject:'20'test'0D''0A'
Content-Type:'20'text/plai n;'20'char set=ISO-88 59-1;'20'f ormat=flow ed'0D''0A'
Content-Transfer-Encoding: '20'7bit'0 D''0A'
DKIM-Signature:'20'v=1;'20 'a=rsa-sha 256;'20'c= simple/sim ple;'20'd= dmni.com;' 20's=mail; '0D''0A'
'09't=1246851522;'20'bh=ei a2az/UdYM0 rrrQdlzT2J 7mtRFp+U90 A+31+SxljO A=;'0D''0A '
'09'h=Message-ID:Date:From :Reply-To: MIME-Versi on:To:Subj ect:'0D''0 A'
'09''20'Content-Type:Conte nt-Transfe r-Encoding ;'0D''0A'
'09'b=
Canonicalized Body:
This'20'is'20'a'20'DKIM'20 'test'0D'' 0A'
DNS record(s):
mail._domainkey.dmni.com. 300 IN TXT "v=DKIM1; g=*; k=rsa; p=MHwwDQYJKoZIhvcNAQEBBQAD awAwaAJhAL hSt5fje4cH HR2f6r61Hx 8uup/qbnJo MGIYnvXiH1moNDtBt2QaW/uDto RfzQgKG9X9 Kv3ZnuSeHw vWMW17UgpK 3uHk/OrB 9AM/+YSfzjL3dj2no7iR+JBpx7 wQ0R17kwID AQAB"
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: header.From=thomas@dmni.co m
DNS record(s):
dmni.com. 300 IN TXT "v=spf1 ip4:174.143.94.154 -all"
Did anyone actually resolve this and can let me know what i do wrong. I am on this much to long and have reached the end of my ideas what else to do to get this done.
Thank you all for the assistance.
Best wishes,
Thom
I an effort to setup a good mail service I have implemented DKIM in addition to spf.
All seemed to work fine but I have some issues with the signature and hope that maybe someone has the same issue and resolved it.
I did make lots of research and several people did indicate they had the issue but for some reason there is no definitive answer that assists me to resolve this on my system.
I run Linux RHEL 5 64bit - Sendmail - DKIM-filter
If I send a email to google it indicates "dkim=neutral (no key) header.i=@dmni.com" I tried hard but I do not understand this. I do have a private and public key and all should be there.
I do start the filter with:
dkim-filter -l -p inet:8891@localhost -b sv -c simple -d dmni.com -k /var/db/domainkeys/mail.ke
the key folder and file us assigned to the user dkim
The dns has the entry:
mail._domainkey.dmni.com. 300 IN TXT v=DKIM1; g=*; k=rsa; p=MHww ... AB
Here is what google says and see below this the test at check-auth@verifier.port25
Delivered-To: thomanji@gmail.com
Received: by 10.220.92.139 with SMTP id r11cs61468vcm;
Fri, 3 Jul 2009 23:43:23 -0700 (PDT)
Received: by 10.90.101.7 with SMTP id y7mr775242agb.5.1246689803
Fri, 03 Jul 2009 23:43:23 -0700 (PDT)
Return-Path: <thomas@dmni.com>
Received: from app2.dmni.com (app2.dmni.com [174.143.94.154])
by mx.google.com with ESMTP id 5si10643557gxk.91.2009.07.
Fri, 03 Jul 2009 23:43:22 -0700 (PDT)
Received-SPF: pass (google.com: domain of thomas@dmni.com designates 174.143.94.154 as permitted sender) client-ip=174.143.94.154;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of thomas@dmni.com designates 174.143.94.154 as permitted sender) smtp.mail=thomas@dmni.com;
Received: from [127.0.0.1] ([120.138.81.35])
(authenticated bits=0)
by app2.dmni.com (8.13.8/8.13.8) with ESMTP id n646hTG4028468
for <thomanji@gmail.com>; Sat, 4 Jul 2009 02:43:31 -0400
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=dmni.com; s=mail;
t=1246689812; bh=VYvGzrJLAW0zN632OqvdJBG
h=Message-ID:Date:From:Rep
Content-Type:Content-Trans
b=oidJm99ubX8ljlG2e+Sla9IP
SRuzSUl+Y98RpeRFQYwM2iEu7N
Message-ID: <4A4EFA05.9020904@dmni.com
Date: Sat, 04 Jul 2009 14:43:17 +0800
From: Thomas Bernthaler <thomas@dmni.com>
Reply-To: thomas@dmni.com
Organization: DMNI
User-Agent: Thunderbird 2.0.0.22 (Windows/20090605)
MIME-Version: 1.0
To: thomanji@gmail.com
Subject: test new
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding:
check-auth@verifier.port25
==========================
Summary of Results
==========================
SPF check: pass
DomainKeys check: neutral
DKIM check: pass
Sender-ID check: pass
SpamAssassin check: ham
==========================
Details:
==========================
HELO hostname: app2.dmni.com
Source IP: 174.143.94.154
mail-from: thomas@dmni.com
--------------------------
SPF check details:
--------------------------
Result: pass
ID(s) verified: smtp.mail=thomas@dmni.com
DNS record(s):
dmni.com. 300 IN TXT "v=spf1 ip4:174.143.94.154 a:n2b.bullet.mail.aue.yaho
--------------------------
DomainKeys check details:
--------------------------
Result: neutral (message not signed)
ID(s) verified: header.From=thomas@dmni.co
DNS record(s):
--------------------------
DKIM check details:
--------------------------
Result: pass (matches From: thomas@dmni.com)
ID(s) verified: header.d=dmni.com
Canonicalized Headers:
Message-ID:'20'<4A5171B8.7
Date:'20'Mon,'20'06'20'Jul
From:'20'Thomas'20'Berntha
Reply-To:'20'thomas@dmni.c
MIME-Version:'20'1.0'0D''0
To:'20'check-auth@verifier
Subject:'20'test'0D''0A'
Content-Type:'20'text/plai
Content-Transfer-Encoding:
DKIM-Signature:'20'v=1;'20
'09't=1246851522;'20'bh=ei
'09'h=Message-ID:Date:From
'09''20'Content-Type:Conte
'09'b=
Canonicalized Body:
This'20'is'20'a'20'DKIM'20
DNS record(s):
mail._domainkey.dmni.com. 300 IN TXT "v=DKIM1; g=*; k=rsa; p=MHwwDQYJKoZIhvcNAQEBBQAD
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: header.From=thomas@dmni.co
DNS record(s):
dmni.com. 300 IN TXT "v=spf1 ip4:174.143.94.154 -all"
Did anyone actually resolve this and can let me know what i do wrong. I am on this much to long and have reached the end of my ideas what else to do to get this done.
Thank you all for the assistance.
Best wishes,
Thom
I see you have t=1246689812 specified in your DKIM DNS txt record. That means testing. Remove it and see if you pass.
ASKER
Hi Rackaid2,
Thank you very much for your answer.
However i do have in my DNS record the following:
mail._domainkey.dmni.com. 300 IN TXT v=DKIM1; g=*; k=rsa; p=MHww ... AB
No T, but now that you mentioned this I see that in google it has this in. I guess not I have another issues that does not make sense to me.
Also further down where you see the test with check-auth@verifier.port25 .com, it shows:
DKIM-Signature:'20'v=1;'20 'a=rsa-sha 256;'20'c= simple/sim ple;'20'd= dmni.com;' 20's=mail; '0D''0A'
'09't=1246851522;'20'bh=ei a2az/UdYM0 rrrQdlzT2J 7mtRFp+U90 A+31+SxljO A=;'0D''0A '
'09'h=Message-ID:Date:From :Reply-To: MIME-Versi on:To:Subj ect:'0D''0 A'
'09''20'Content-Type:Conte nt-Transfe r-Encoding ;'0D''0A'
'09'b=
which is the actual key and it does not have the test tag in there.
Best wishes,
Thom
Thank you very much for your answer.
However i do have in my DNS record the following:
mail._domainkey.dmni.com. 300 IN TXT v=DKIM1; g=*; k=rsa; p=MHww ... AB
No T, but now that you mentioned this I see that in google it has this in. I guess not I have another issues that does not make sense to me.
Also further down where you see the test with check-auth@verifier.port25
DKIM-Signature:'20'v=1;'20
'09't=1246851522;'20'bh=ei
'09'h=Message-ID:Date:From
'09''20'Content-Type:Conte
'09'b=
which is the actual key and it does not have the test tag in there.
Best wishes,
Thom
I would try sending to Gmail again. If you changed your DNS record during testing, Gmail and similar providers often cache DNS for a period.
Port25 shows your DKIM working so perhaps this was a temp issue with your DNS.
Port25 shows your DKIM working so perhaps this was a temp issue with your DNS.
ASKER CERTIFIED SOLUTION
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ASKER
Thank you very much, I appreciate the assistance.
I understand that this is a very specific issue and maybe not many people use DKIM at this time.
Lets see if anyone can help.
All the best,
thomas