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--- plugins:opendkim [2017/04/24 21:30]
nuxwin
+++ plugins:opendkim [2017/09/25 18:04] (current)
nuxwin
@@ Line 1: / Line 1: @@
-See https://github.com/i-MSCP/plugins/blob/master/incubator/OpenDKIM/README.md
+<WRAP center round important 60%>
+**Bear in mind that this documentation is for the last available version. If you use an older version, you must refer to the README.md file inside the plugin archive.**
+</WRAP>
+<markdown>
+# i-MSCP OpenDKIM plugin
+Provides DomainKeys Identified Mail (DKIM) service through MILTER.
+## Introduction
+DKIM provides a way for senders to confirm their identity when sending email by
+adding a cryptographic signature to the headers of the message.
+## Requirements
+- i-MSCP Serie ≥ 1.4.x
+## Installation
+. Upload the plugin through the plugin management interface
+. Install the plugin through the plugin management interface
+## Update
+. Be sure that all requirements as stated in the requirements section are met
+. Backup your plugin configuration file if needed
+. Upload the plugin through the plugin management interface
+### Restore you plugin configuration file if needed
+. Restore your plugin configuration file (compare it with the new version
+   first)
+. Update the plugin list through the plugin management interface
+## Configuration
+See [Configuration file](https://github.com/i-MSCP/plugins/blob/master/incubator/OpenDKIM/config.php)
+When changing a configuration parameter in the plugin configuration file, don't
+forget to trigger a plugin list update, else you're changes will not be token
+into account.
+## Plugin working level
+It is possible to choose the plugin working level through the
+`plugin_working_level` plugin configuration parameter. There are actually two
+working levels which are `admin` and `reseller`.
+When it works at the `admin` level, the plugin activates OpenDKIM for all
+customers automatically. In this working level, resellers can only trigger
+renewal of DKIM keys through their own management interface.
+When it works at `reseller` level, the plugin doesn't activate OpenDKIM
+automatically for customers. Resellers must enable the OpenDKIM feature
+manually for all of their customers.
+## Usage of an external DNS server
+If you make use of an external DNS server (not the one managed by i-MSCP), you
+must not forget to add the DKIM and ADSP DNS resource records in the zone of
+your domain.
+Each domain has one DKIM and one ADSP DNS resource records and each subdomain has
+one ADSP resource record.
+## Testing
+### Internal DKIM test
+You can check on the command line if OpenDKIM is working for your domain by
+running the following command:
+```
+opendkim-testkey -d example.com -s mail -vvv
+```
+The result should look similar like this one:
+```
+root@jessie32:/etc/opendkim# opendkim-testkey -d weird.test.bbox.nuxwin.com -s mail -vvv
+opendkim-testkey: using default configfile /etc/opendkim.conf
+opendkim-testkey: checking key 'mail._domainkey.weird.test.bbox.nuxwin.com'
+opendkim-testkey: key not secure
+opendkim-testkey: key OK
+```
+Note that the `key not secure` message doesn't indicate an error. It is the
+expected consequence of not using DNSSSEC.
+You can also query your DNS server to check the TXT record for your domain:
+```
+dig -t txt mail._domainkey.example.com
+```
+### External DKIM test
+Go to [dkimvalidator.com](http://dkimvalidator.com) and send a mail from the
+domain for which you activated OpenDKIM to the random mail address. Once you
+have sent the mail, wait few seconds and then, click on the `View Results`
+button. You should get a result similar to:
+#### Original Message
+```
+Received: from jessie32.bbox.nuxwin.com (xxx-xxx-xx-xx.abo.bbox.fr [xxx.xxx.xx.xx])
+	by relay-4.us-west-2.relay-prod (Postfix) with ESMTPS id 9B57F160208
+	for <[email protected]>; Sat,  2 Sep 2017 18:29:48 +0000 (UTC)
+Received: from panel.bbox.nuxwin.com (jessie32.bbox.nuxwin.com.local [127.0.0.1])
+	(Authenticated sender: [email protected])
+	by jessie32.bbox.nuxwin.com (Postfix) with ESMTPA id F3E645FC6A
+	for <[email protected]>; Sat,  2 Sep 2017 20:30:21 +0200 (CEST)
+DKIM-Filter: OpenDKIM Filter v2.9.2 jessie32.bbox.nuxwin.com F3E645FC6A
+DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple;
+	d=weird.test.bbox.nuxwin.com; s=mail; t=1504377022;
+	[email protected];
+	bh=g3zLYH4xKxcPrHOD18z9YfpQcnk/GaJedfustWU5uGs=;
+	h=Date:From:To:Subject:From;
+	b=HdAyJ/C0tBH5UkzZSGXo2ESZ6+8tCr1O/LC3REVuyRg1TSB/bYGDAv/H05+nJSisD
+	 fExsy/Irnjjz5bVNSUq0nB8mPoHaTMibh9mWAC/Q23WDsu9j9vprH5TGw0k91UUuur
+	 XQm2anEaugJtvEpCSdOf3CMHlxUF9M/oMti+Bm0N/aoqsvu1vRZHazQH4PUMd+Thyq
+	 PtnEx4ZPQaU/f1HOdZTi7c4KjwWHoLDdQ1mNAwknUMjm5hsw2MGIIW0ecumNqzzKZH
+	 vIFhX75q2Hw03rByI5paaUrf6bAEozOmQghDTzz+07pn/aYhoK+jNYMEvev/F8pRqz
+UbuEZYMC1w==
+MIME-Version: 1.0
+Content-Type: text/plain; charset=US-ASCII;
+ format=flowed
+Content-Transfer-Encoding: 7bit
+Date: Sat, 02 Sep 2017 20:30:21 +0200
+From: [email protected]
+To: [email protected]
+Subject: test
+Message-ID: <[email protected]>
+X-Sender: [email protected]
+User-Agent: Roundcube Webmail/1.2.5
+test
+```
+#### DKIM Information
+```
+DKIM Signature
+Message contains this DKIM Signature:
+DKIM-Filter: OpenDKIM Filter v2.9.2 jessie32.bbox.nuxwin.com F3E645FC6A
+DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple;
+	d=weird.test.bbox.nuxwin.com; s=mail; t=1504377022;
+	[email protected];
+	bh=g3zLYH4xKxcPrHOD18z9YfpQcnk/GaJedfustWU5uGs=;
+	h=Date:From:To:Subject:From;
+	b=HdAyJ/C0tBH5UkzZSGXo2ESZ6+8tCr1O/LC3REVuyRg1TSB/bYGDAv/H05+nJSisD
+	 fExsy/Irnjjz5bVNSUq0nB8mPoHaTMibh9mWAC/Q23WDsu9j9vprH5TGw0k91UUuur
+	 XQm2anEaugJtvEpCSdOf3CMHlxUF9M/oMti+Bm0N/aoqsvu1vRZHazQH4PUMd+Thyq
+	 PtnEx4ZPQaU/f1HOdZTi7c4KjwWHoLDdQ1mNAwknUMjm5hsw2MGIIW0ecumNqzzKZH
+	 vIFhX75q2Hw03rByI5paaUrf6bAEozOmQghDTzz+07pn/aYhoK+jNYMEvev/F8pRqz
+UbuEZYMC1w==
+Signature Information:
+v= Version:         1
+a= Algorithm:       rsa-sha256
+c= Method:          relaxed/simple
+d= Domain:          weird.test.bbox.nuxwin.com
+s= Selector:        mail
+q= Protocol:
+bh=                 g3zLYH4xKxcPrHOD18z9YfpQcnk/GaJedfustWU5uGs=
+h= Signed Headers:  Date:From:To:Subject:From
+b= Data:            HdAyJ/C0tBH5UkzZSGXo2ESZ6+8tCr1O/LC3REVuyRg1TSB/bYGDAv/H05+nJSisD
+	 fExsy/Irnjjz5bVNSUq0nB8mPoHaTMibh9mWAC/Q23WDsu9j9vprH5TGw0k91UUuur
+	 XQm2anEaugJtvEpCSdOf3CMHlxUF9M/oMti+Bm0N/aoqsvu1vRZHazQH4PUMd+Thyq
+	 PtnEx4ZPQaU/f1HOdZTi7c4KjwWHoLDdQ1mNAwknUMjm5hsw2MGIIW0ecumNqzzKZH
+	 vIFhX75q2Hw03rByI5paaUrf6bAEozOmQghDTzz+07pn/aYhoK+jNYMEvev/F8pRqz
+UbuEZYMC1w==
+Public Key DNS Lookup
+Building DNS Query for mail._domainkey.weird.test.bbox.nuxwin.com
+Retrieved this publickey from DNS: v=DKIM1; h=sha256; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsGfEnQP49L7DrUvR8/cPOciHvATQkxXTgBm4qUcNFFDLnT6s45xsmU068RTED/QGJWaeL2eQcd7c5p7dlUdqVugYSfB+aDjOJuvPIr3P/jiISt6HERoBafu7pkc2mj92S70Xq3Jyx6lgIhMe63UGKyeyuBJHB7Nm3KHHiZFqH7AWtQwgBpMqa7LKPj4OCIELZ+G8SO8OMAkytLndDf40lABXXHsyjFSTaOPb27BStTLBmZT58AwPtSHTZ7+8hz+reHZDUXMos96SiwcvxOepDMSBMMdKpAI7iu+v86F+ewaMRllAogVIAFZb68DgjAUvk6fwDE4mwGyGk1y7QdKVEwIDAQAB
+Validating Signature
+result = pass
+Details:
+```
+#### SPF Information
+```
+Using this information that I obtained from the headers
+Helo Address = jessie32.bbox.nuxwin.com
+From Address = [email protected]
+From IP      = xxx.xxx.xx.xx
+SPF Record Lookup
+Looking up TXT SPF record for sub1.weird.test.bbox.nuxwin.com
+Found the following namesevers for sub1.weird.test.bbox.nuxwin.com:
+Retrieved this SPF Record: zone updated 20170902 (TTL = 43897)
+Using local nameserver for SPF resolution.  This will probably be cached!
+Result: pass (Mechanism 'include:weird.test.bbox.nuxwin.com' matched)
+Result code: pass
+Local Explanation: sub1.weird.test.bbox.nuxwin.com: Sender is authorized to use '[email protected]' in 'mfrom' identity (mechanism 'include:weird.test.bbox.nuxwin.com' matched)
+spf_header = Received-SPF: pass (sub1.weird.test.bbox.nuxwin.com: Sender is authorized to use '[email protected]' in 'mfrom' identity (mechanism 'include:weird.test.bbox.nuxwin.com' matched)) receiver=dkimvalidator.com; identity=mailfrom; envelope-from="[email protected]"; helo=jessie32.bbox.nuxwin.com; client-ip=xxx.xxx.xx.xx
+```
+Regarding the SpamAssassin information at bottom, you can ignore them as the
+SpamAssassin installation used is not able to validate DKIM signatures when
+DKIM ADSP extension is involved.
+## License
+    i-MSCP  OpenDKIM plugin
+    Copyright (C) 2013-2017 Laurent Declercq <[email protected]>
+    Copyright (C) 2013-2016 Rene Schuster <[email protected]>
+    Copyright (C) 2013-2016 Sascha Bay <[email protected]>
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; version 2 of the License
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+</markdown>

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