Identity

Unit: opendkim.service
Daemon: opendkim
Config: /etc/opendkim.conf
Key directory: /etc/opendkim/keys/
Socket: /run/opendkim/opendkim.sock (unix) or 127.0.0.1:8891 (inet)
User: opendkim
Milter group: opendkim (Postfix user must be a member)
Logs: journalctl -u opendkim, /var/log/mail.log (milter events appear in mail log)
Distro install: apt install opendkim opendkim-tools / dnf install opendkim

Key Operations

Operation	Command
Status	`systemctl status opendkim`
Generate key pair	`opendkim-genkey -b 2048 -d example.com -s mail -D /etc/opendkim/keys/example.com/`
List current keys	`ls -la /etc/opendkim/keys/`
Print public key (for DNS)	`cat /etc/opendkim/keys/example.com/mail.txt`

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