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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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OpenDKIM & OpenDMARC on SLES 15 SP2

Hello is it possible to install OpenDKIM & OpenDMARC on SLES 15 SP2 through the default repository of OpenSUSE?
manwithamission
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OpenDkim - PHPMailer - Failure OpenDkim

my dkim configuration was working just fine. Im working with an email marketing app, pretty simple, normally i used to send the campaign with a Sender ID that is my domain company, and for the From Email, the customer email. I signed the dkim wih my…
Luis Alfredo Serrano Díaz
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opendkim milter not launching on proper server socket

The following error impeded the restart of opendkim × opendkim.service - OpenDKIM Milter Loaded: loaded (/lib/systemd/system/opendkim.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Sat 2023-04-22…
Jerome
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opendkim-testkey: key not secure (file permissions are good and TrustAnchorFile config setting is set)

If I run sudo opendkim-testkey -d mydomain.com -s selector -vvv, I get opendkim-testkey: using default configfile /etc/opendkim.conf opendkim-testkey: checking key 'selector._domainkey.mydomain.com' opendkim-testkey: key not secure opendkim-testkey:…
Robert K S
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Configurating DKIM and SPF, key not secured

On a Ubuntu 20.04 VPS, installing opendkim via sudo apt install opendkim opendkim-tools proceeds as expected, following the steps provided here. However, upon testing, while e-mails get sent in practice to the targetted mailbox with a very low spam…
Jerome
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What is the correct way to sign mail on a relay MTA

I have a setup where outbound mail from an internal mail server (lets call it System A) is relayed to a smart host (we will call this System B) which then sends it out to the Internet and eventually the receiving end's MTA (System C). I have full…
Tuaris
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How to correctly configure OpenDKIM with Postfix on Debian 11?

The desired settings are to create a multi domain mail server. This is my main domain example.com and this is my subdomain: mail.example.com Taking the rDNS as the following verifications: hostname -f nano /etc/mailname nano /etc/hostname As a…
J. Mick
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Postfix Sendonly Multiple Domains - smtp Auth for each domain?

My title pretty much sums it up I have recently setup a sendonly postfix server i used this guide https://www.linuxbabe.com/mail-server/postfix-send-only-multiple-domains-ubuntu#generate-dkim-keypair It works as expected. The purpose of this server…
Chayne
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Postfix OpenDKIM unable to sign outbound email

I configured OpenDKIM following the guidelines here: https://www.linuxbabe.com/mail-server/setting-up-dkim-and-spf Rather than generate keys I used those already configured on our domain, that were generated in the Gmail admin portal. Everything…
btongeorge
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SendMail Bounce Back Missing Send To Address in Transcript

SendMail bounce back response is showing a blank To address. How can I correct this so the bounce back includes the To address? This began occurring after installing opendkim on the server and before DKIM was enabled. Sendmail version did not…
Dorothy
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DKIM_INVALID in Spamassassin only for emails sent from other emails in the same server

I have postfix/dovecot running with spamassassin on Centos. PROBLEM: The VPS acts as a mail server Spamassassin edits the email subject and adds [SPAM} Ms. Outlook on Windows moves those emails to the Junk folder The above happens ONLY if an email…
Pikk
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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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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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