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Questions tagged [opendkim]

Open source implementation of the DKIM (Domain Keys Identified Mail). The capabilities include signing and verifying DKIM signature of the email.

OpenDKIM is an open source implementation of the (Domain Keys Identified Mail) sender authentication system standardized by the IETF (RFC6376). The project started from a code fork of version 2.8.3 of the open source dkim-milter package,

OpenDKIM capabilities was including signing and verifying DKIM signature of the email. The package consists of a library that implements the DKIM service and a milter-based filter application that can plug in to any milter-aware MTA such as and .

The documentation of command line options can be found in this page.
The documentation of opendkim.conf configuration file can be found in this page.

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Setting up OpenDKIM correctly with a domain / subdomain send only server

I'm setting up an EC2/AWS instance to send email, currently on mail-tester it is reporting that my email is not signed with DKIM. I think I may have set up DKIM incorrectly. I used the following tutorial:…
David N
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OpenDKIM & Mailman

I have a small mail server based on Fedora with postfix, OpenDKIM, spamassassin and mailman. OpenDKIM signature for outgoing emails works OpenDKIM verification for incoming emails works When a DKIM message is sent to a mailing list I see the…
Matteo
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Configuring postfix and opendkim socket value

I have the following line in my /etc/postfix/main.cf smtpd_milters=inet:127.0.0.1:8891 inet:127.0.0.1:8893 So then What should I put for Socket in /etc/default/opendkim or /etc/opendkim.conf ?
user17130130
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opendkim: Restore /etc/default/opendkim to original values

I accidentally overwrote my /etc/default/opendkim while changing the configuration. How can I restore it to the "factory defaults"? I already tried uninstalling and re-installing the package.
Yván Ecarri
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Why is SELinux preventing opendkim from accessing private key files, and how do I fix it?

I'm trying to set up opendkim with Postfix (on CentOS). Having copied my known good private key into place, I'm seeing this: Nov 16 12:54:26 [host.domain] setroubleshoot[10093]: SELinux is preventing opendkim from open access on the file…
MikeBeaton
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Should "record not found" errors from opendkim for external domains be showing up in /var/log/mail.err?

I have set up opendkim for the first time. I see many of log entries similar to the following in my /var/log/mail.err file: Oct 13 20:02:51 email opendkim[24304]: 0873142234: key retrieval failed (s=omega, d=ctdems.org):…
StevieD
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stop opendkim from signing emails if it already has signature

I am signing all the emails for all domains that goes through my postfix MTA, but I need to custom sign some emails for some domain from my application, is it possible to stop opendkim from signing emails if it already has signature?
Anil Bind
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intermittent DKIM failure

We have several email servers that send out legitmate email via PostFix and use openDKIM. Recently we've had some recievers claim the DKIM record can not be verified so we've tried various tools such as mail-tester.com, isnotspam.com etc and see the…
dan360
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Opendkim running but not signing?

I have had a lot of fun with OpenDKIM - it is actively running on my Debian box and here is my code: root@web1:~# tail -f /var/log/syslog | grep -i dkim Sep 7 16:35:38 web1 sm-mta[1504]: 087FZbYw001504: Milter insert (1): header: DKIM-Signature: …
Antony
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SPF and DKIM for one domain on two servers

I followed this guide to setup SPF and DKIM for emails to be sent from a server for a domain. That server is the location of the actual email server for the domain. I now want to setup another server to be able to send emails from the domain via…
Kohjah Breese
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What's the right way to enter DKIM string into BIND zone file?

I use Ubuntu 16.04 LTS. I'm been having this annoying issue again with entering DKIM string (that long code) into my BIND's zone file. In the past (for a different domain) I used to bypass that issue by first copying the string from OpenDKIM's…
papakota
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Can I DKIM sign my email without running a server daemon just for that?

I have an email server that is working perfectly. However, more and more other email servers are getting strict about DKIM signing and DMARC records so I guess I need to finally set that up ... I am running a bind9 DNS server (works perfectly) and a…
user227963
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How to implement DKIM for Domino mail server?

I'd like to write a Domino servlet that will stamp outgoing mail with a DKIM domain keys signature. We would generate the Domino mail server DKIM signature and put it in a TXT file with the DNS manager. How can I stamp an outgoing message with the…
teleman
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openssl .so library version incompatible

I upgraded to openssl-1.1.1d from openssl-1.0.0 But, opendkim supports openssl-1.0. So, some changes were done and compiled it. The compiling was okay. When I try to run the binary, sometimes it runs. But, mostly the following error…
fury.slay
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Can I use a different public key for DKIM signatures for the same domain?

Can I have separate public keys for the following : support@mydomain.com myaddr@mydomain.com I am using a keytable so my initial feel is to create the keys using a different selector and since I am using the keytable, the selector referenced in…
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