1 `dkim_selector`: `<string>` ::
5 `dkim_sign`: `<boolean>` ('default =' `0`)::
7 DKIM sign outbound mails with the configured Selector.
9 `dkim_sign_all_mail`: `<boolean>` ('default =' `0`)::
11 DKIM sign all outgoing mails irrespective of the Envelope From domain.