OpenDMARK Check (Ubuntu 18.04)

Noch in Bearbeitung

Installation

sudo apt-get install -y opendmarc

Bei der Frage Configure database for opendmarc with dbconfig-common? die Antwort NEIN wählen.

Konfiguration

Die Datei

sudo vi /etc/opendmarc.conf

bearbeiten und folgende Parameter anpassen bzw. hinzufügen:

AuthservID OpenDMARC

Socket local:/var/spool/postfix/opendmarc/opendmarc.sock

TrustedAuthservIDs mail1.kirner.or.at

## Optional
#RejectFailures true

## You may want OpenDMARC to ignore SMTP clients that are successfully 
## authenticated via SMTP AUTH.
IgnoreAuthenticatedClients true

## This will reject emails that don't conform to email header standards 
## as described in RFC5322. For example, if an incoming email doesn't 
## have From: header or date: header, it will be rejected.
RequiredHeaders true

## This will cause OpenDMARC to perform a fallback SPF check itself when 
## it can find no SPF results in the message header.
SPFSelfValidate true

Das Verzeichnis für den Socket muss noch angelegt und für den Benutzer postfix schreibbar gemacht werden:

sudo mkdir -p /var/spool/postfix/opendmarc
sudo chown opendmarc:opendmarc /var/spool/postfix/opendmarc
sudo chmod 750 /var/spool/postfix/opendmarc/
sudo adduser postfix opendmarc

Zum Abschluss den Service neustarten:

sudo systemctl restart opendmarc.service

Postfix

sudo vi /etc/postfix/main.cf

Links

https://www.linuxbabe.com/mail-server/opendmarc-postfix-ubuntu

https://blog.schaal-24.de/mail/dmarc-check-unter-debian-wheezy/

https://blog.schaal-24.de/mail/dmarc-reports-erstellen/

http://www.postfix.org/MILTER_README.html

http://www.trusteddomain.org/opendmarc/

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