docker compose -f /opt/mailcow-dockerized/docker-compose.yml exec rspamd-mailcow rspamadm dkim_keygen -d example.com -s mailcow -b 2048 -k /etc/rspamd/dkim/mailcow.key

Category: Mail Servers & Postfix

docker compose -f /opt/mailcow-dockerized/docker-compose.yml exec rspamd-mailcow rspamadm dkim_keygen -d example.com -s mailcow -b 2048 -k /etc/rspamd/dkim/mailcow.key

Generate a DKIM key with a custom selector and file

This variant writes the private key to /etc/rspamd/dkim/mailcow.key and prints only the public DNS record, which Mailcow's docs use for manual setups. The selector mailcow must match the TXT record name mailcow._domainkey.example.com. Keep the private key inside the container and readable by rspamd only.
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