Questions tagged [opendkim]

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

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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 ...
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Library compiling version mismatch

While compiling I get the following error (warning is not a problem), /usr/bin/ld: warning: libssl.so.10, needed by ZMTA_SERVER/dependencies/lib/libopendkim.so, may conflict with libssl.so.1.1 ...
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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....
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DKIM set on AWS EC2 but mail header says none in Outlook

I'm configuring an AWS EC2 instance with Postfix, and have set it up with Route53 including reverse DNS. I've tested that I can send emails, and Outlook receives them fine, but Gmail does not. I ...
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62 views

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 ...
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SOLVED: Amavis and dkim signature on incoming mails: header.s ignored

I am a little bit confused with how amavis process incoming mails. The Postfix service on my Zimbra server is configured to sign outgoing mails. And it works like a charm. Problem is mails sent to ...
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56 views

Opendkim signature fail after postifx change domain name

I have a server on Scaleway with postfix+opendkim installed. I configured posfix to firm the message using opendkim and to encript it using TLS. Initially postix was sending the mail using @hostname ...
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167 views

DKIM/Postfix/Debian trouble: Postfix cannot connect to opendkim socket

Setup: Debian 10, postfix 3.4.7 and opendkim 2.11 (both installed from Debian's repositories). I followed Debian's instructions at https://wiki.debian.org/opendkim What looks like the culprit is the ...
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Trouble with building opendkim from slackbuilds.org on slackware current

On slackware current there are two openssl libs: $openssl version OpenSSL 1.1.1d 10 Sep 2019 $openssl-1.0 version OpenSSL 1.0.2t 10 Sep 2019 $ls /usr/lib64/openssl-1.0 engines include -> /usr/...
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OpenDKIM query timed out (even with opendkim-testkey and Nameservers set)

I try to set up a mail server on Debian with opendkim and opendmarc When I receive an email, SpamAssassin refuse it because opendkim can't do the DNS query I tested with opendkim-testkey command, ...
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Opendkim failed without logs

I created mail server: postfix and dovecot. I want to add opendkim. On debian 9 I installed opendkim v2.11. I used this tutorial. apt-get install opendkim opendkim-tools installed all. When I ...
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41 views

OpenDKIM fails to start

I'm trying to install OpenDKIM on Ubuntu 18.04.3 LTS It simply does not start. First I was starting it through the systemd service, but running it from the command line produces the same result. I ...
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Postfix send subdomain emails rewritten to main domain

I have Postfix + Dovecot + Mysql config, where I support multiple domains. The problem is when I add subdomain that already has main domain in virtual_mailbox_domains, Postfix rewrites it to main ...
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1answer
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Procmail recipe - If no dkim signature then forward to .spam

Having read through the documentation at http://pm-doc.sourceforge.net/doc/ i cannot find an answer. I want to use procmail to place mail without dkim into user's spam folder. I have found many ...
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Some incoming mail headers have “Authentication-Results: none”, why the checks are sometimes not being performed?

I saw in some incoming mail headers the following: Authentication-Results: mx1.example.com; none It means: The special case of "none" is used to indicate that no message authentication is ...
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OpenDKIM: Use MySQL socket in KeyTable/SigningTable

How can i connect to a MySQL socket (not TCP) with e.g. KeyTable/SigningTable in OpenDKIM? The dataset which needs to be used is "dsn:" and the manual says: If the string begins with "dsn:" and ...
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217 views

OpenDKIM generates 2 keys

I've followed instructions to set up spf and DKIM on my mailing server. SPF is working fine so far, however I am having problem with DKIM. In every single instruction website, they show the output ...
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opendkim-testkey returns 'multiple DNS replies for 201907._domainkey.example.com' [duplicate]

I am installing opendkim in my POSTFIX mail server on a ec2 with an ubuntu 16.04 xenial by fallowing This guide in linode. I've set a txt DNS record named 2019._domainkey.example.com with the key ...
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332 views

No signing table match for <user@gmail.com> in OpenDKIM configuratio

I have a problem with my opendkim configuration. I have the alias ciao@mrtsolutions.it that forward all to mymail@gmail.com. When I send email to alias ciao@mrtsolutions.it from me@mrtsolutions.it, I ...
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OpenDKIM / Postfix sign console-sent mail, but not from a mail client / SMTP

I have Postfix running on a Debian 9 machine, and installed opendkim (both from the Debian repositories). The milter socket/connection is inet:localhost:8892, and the iptables firewall allows that ...
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1answer
25 views

OpenDKIM - Correct setting for “MTA” option

I have a server which is used purely for outbound email. I would like opendkim to sign every email going through, assuming it has a signing table entry. However, I can't seem to find any documentation ...
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RSPAMD + DKIM Signing: How to be able to use a single DKIM Key for multiple domains?

I was able to setup a Single DKIM Key for multiple domains with OPENDKIM by using their KeyTables and SigningTable. But since the company started to use RSPAMD, I could not use OPENDKIM along with ...
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DKIM - many subdomains without multiple txt records

I've been having trouble with opendkim, figuring out how to best create records for multiple subdomains. I've tried using wildcards to cover all of the subdomains and wasn't able to get it working. I ...
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1answer
463 views

DKIM signature failure only on CRON jobs

I originally posted this on askubuntu but there's been no response there. I have successfully installed Postfix and OpenDkim on my server, and it's correctly signing mail from several different ...
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OpenDKIM signing conditions

Is it possible to use conditions for signing outgoing messages with OpenDKIM? It should only sign outgoing messages if the selector exists in DNS.
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333 views

OpenDMARC with multiple MX: correct setup for trust between servers

There are many tutorials on how to setup OpenDMARC on your favorite flavor of Linux, but they all focus on single server configurations. My goal was to keep backup secondary MX servers, but enforce ...
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770 views

Dkim record fails - A public-key (p=) is required

I setup dkim record using following tutorial. But when I check the mx records using googleapps toolbox and dkimcore cheking tool it gives error google says dkim is not setup, dkimcore says A public-...
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354 views

difference between local and inet socket?

I noticed that, while setting up opendkim, the options for the Socket are: #SOCKET="local:/var/run/opendkim/opendkim.sock" # default #SOCKET="inet:54321" # listen on all interfaces on port 54321 #...
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1answer
101 views

OpenDKIM: Add public key to domain, Debian 9, GoDaddy

I was trying to add my DKIM public key to my domain, but i don't know how i have to modify it This is my entire public key file mail._domainkey IN TXT ( "v=DKIM1; h=sha256; k=rsa; " "p=...
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715 views

Tons of OpenDKIM Issues

I for the life of me cannot get OpenDKIM to work correctly. I can send and receive messages just fine with postfix and roundcube. I have tried tons of things to get this working. At this point, I am ...
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Postfix: proper configurations - main.cf, DNS, DKIM

Inherited an Ubuntu server (12.04) running Postfix (2.9.6) that works as an outbound-only mail relay for a web application. Have got SPF and DMARC records entered in public DNS (Route53). Working to ...
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opendkim on lokal net not working

I have a assignment in school to setup bind9, postfix, spf, dkim and dovecot on the same machine for the address mcduckcorp.duckburg.cali on a Debian 9 OS. I have managed to setup bind9, postfix and ...
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338 views

DKIM public key & DKIM from DNS are the same but don't match because of spacing

Please take a look at this picture of mail-tester.com saying that Your DKIM signature is not valid. As you can see, the DKIM signature and public key are identical in term of text (characters) but ...
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1answer
144 views

How mailchimp can sign email changing the domain and from header?

I've configured a SMPT server using postfix, dovecot, opendkim, openspf, openssl etc... I'm trying to figured out how mailchimp can send mails signed by their servers and deliver to recipients without ...
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215 views

OpenDKIM starts before MariaDB on Ubuntu 18.04

I installed OpenDKIM on Ubuntu Server 18.04, using it with Modoboa, so the config file contains DSN for KeyTable and SigningTable to connect to MariaDB. I noticed that the service always fails to ...
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990 views

can I use multiple selectors for opendkim?

I have 4 domains hosted on a single server. Should I use 4 separate dkim keys or one for all of them? Also as far as selectors go do I need to use the one specified in opendkim.conf or can/should I ...
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136 views

OpenDKIM Exited status and mysql plaintext passwords

On my VPS Debian Jessie, email server Postfix + Dovecot with user and password on MySQL, I've installed OpenDKIM, that use MySQL for keys too. If for some reason the server reboot, I can find every ...
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1answer
3k views

opendkim no signing table match for no signature data

I got an error when I try to install and config opendkim : no signing table match for 'contact@domain.com' no signature data opendkim.conf : # This is a basic configuration that can easily be ...
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1answer
925 views

OpenDKIM not signing mail sent to relay host with Ubuntu 18.04

I recently migrated a server from Ubuntu 14.04 to one running 18.04 but with the same mail setup. I simply copied over Postfix's main.cf and the contents of /etc/mail/opendkim over. The server is ...
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1answer
2k views

Opendkim: fail (signature doesn't verify)

I had generated my public and private key using opendkim-genkey: opendkim-genkey -s mail -d example.com It is supposed to be linked in the KeyTable file: /etc/opendkim$ cat KeyTable mail._domainkey....
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Centos 6.9 - DKIM - not autenticated

i have this error on postfix (Centos 6.9) May 21 17:41:48 mailer opendkim[1710]: OpenDKIM Filter v2.11.0 starting (args: -x /etc/opendkim.conf -P /var/run/opendkim/opendkim.pid) May 21 17:44:19 ...
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1answer
5k views

opendkim error loading key

I am having a hard time in debugging this error: Syslog: Apr 24 06:18:08 abcex opendkim[24223]: abcex: key data is not secure: /etc/opendkim/keys/abcex.private Apr 24 06:18:08 abcex opendkim[24223]: ...
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971 views

Postfix + opendkim + spamassin: messages are signed twice

I've got Postfix + spamassassin working already and I'm introducing opendkim. I'm almost there except outgoing messages are DKIM signed twice, which is not only useless but even makes them DKIM ...
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3k views

Opendkim fails to start on CentOS 7 (connect to Milter service inet:localhost:8891: Connection refused)

I've got issues with OpenDKIM not starting on my CentOS 7 (with Postfix) server since an update for OpenDKIM crashed a while ago. I've tried the following: service opendkim start Then it says: Job ...
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2answers
764 views

Make postfix/opendkim sign mail from all domains

So, at the moment I am signing mails from specific domains using opendkim and this works. But when I try to send mails from domains that opendkim does not know, they they are not signed. What I want ...
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1answer
2k views

Valid DKIM signature ramdomly fails to validate

The scenario: I have a couple email servers running on Debian behind a firewall, a public IP and I have properly setup my DNS records (MCX, DMARC, DKIM, SPF). This is an example of my DNS records (...
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1answer
742 views

opendkim-testkey returns “invalid data set type”, while if I specify domain and selector I got “Key OK”

I'm having the problem that opendkim testkey returns error "invalid data set type" unless I pass the domain and the selector to the command. Why does it happen? Details below: Without domain and ...
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1answer
3k views

OpenDkim-testkey record not found

trying this command after install opendkim and postfix opendkim-testkey -d aan-tsu.info -s default -v -v -v opendkim-testkey: checking key 'default._domainkey.aan-tsu.info' opendkim- testkey:...
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2k views

OpenDKIM Giving error of no key found

So I've setup OpenDKIM with Postfix and I can still send emails but when I do: opendkim-testkey -d example.com -s mail -vvv I get back: opendkim-testkey: using default configfile /etc/opendkim.conf ...
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1answer
719 views

Postfix extremely slow, lot of mail in maildrop

Im trying to figure out what's wrong with this cofiguration. I've got a lot of mails in /var/spool/postfix/maildrop (around 30k!) and those just dont get away. No error in the logs. If I try to ...