dkim-rotate1

Usage

Overview

dkim-rotate is a tool for managing DKIM (email antispam) keys in a manner that avoids unnecessarily making emails nonrepudiable.

For each instance, dkim-rotate maintains several keys concurrently, using “selectors” in a circular rotation.

See dkim-rotate(7) for the Principles of Operation, and details of how to configure your MTA, DNS, and WWW server.

If no instance is provided, dkim-rotate will operate on all instances matching [a-z][-_0-9a-z]* for which the configuration file /etc/dkim-rotate/instance.zone exists.

See dkim-rotate(5) for details about the instance configuration file.

If an instance is provided and contains a slash, it will be treated as a pathname; otherwise it will be taken as a reference to the configuration file in /etc.

dkim-rotate should normally be run out of cron. It will produce progress information on stdout. It will produce stderr output if and only if something is wrong.

Options

--major

Make progress. Create new keys, advance to using different keys, and reveal old keys, as necessary.

--minor

Make progress, but do not advance to using a new key. If you wish your keys to be rotated at particular times of the day or week, you should run with --major at those times, and --minor otherwise.

For example, the suggested/default configuration runs with --major at 0400 local time. The effect is that emails sent on a particular day all cease to be repudiable at the same time.

--new

Make progress, and, additionally, allow the creation of a new instance. Without --new, it is an error if there is a config file, but no recorded state.

--reinstall

Do not make any progress, but force recreation, reinstallation and reload of MTA and DNS output files.

--status

Produce a status report of all the relevant keys. Do not make any changes.

Options

--etc-dir=etc-dir

Look for instance configuration files in etc-dir rather than /etc/dkim-rotate.

--var-dir=var-dir

Look for instance state directories in var-dir rather than /var/lib/dkim-rotate.