diff --git a/docs/content/config/best-practices/dkim.md b/docs/content/config/best-practices/dkim.md
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+To enable DKIM signature, you must have created your mail accounts.
+Once its done, just run:
+
+    docker run --rm \
+      -v "$(pwd)/config":/tmp/docker-mailserver \
+      -ti tvial/docker-mailserver:v2 generate-dkim-config
+
+Now the keys are generated, you can configure your DNS server by just pasting the content of `config/opedkim/keys/domain.tld/mail.txt` in your `domain.tld.hosts` zone.