I realise there is currently this bug ( Bug 11524 – DKIM/DK signing support in Amavisd ) which is still not marked as resolved.
But my question is more about the general plans for implementation of DKIM signing/DomainKeys within Zimbra.
At the moment all our external outbound mail gets routed through a private Postfix relay VPS which is connected to our Zimbra machine via an SSH tunnel. This VPS has been successfully signing our outbound mail for over a year now using dkim-filter/milter.
When I send a message from a gmail address to our Zimbra domain, it looks like the authentication-results header is being added by Amavisd
So Zimbra is correctly analysing the DKIM signatures of incoming mail.
Authentication-Results: zimbra.ourdomain.com (amavisd-new); dkim=pass; email@example.com
Are there any plans to better integrate DKIM/DomainKeys within the web UI and admin UI?
It would be great to have an icon or something in the headers section of the reading pane which shows the DKIM status of an e-mail (Gmail displays the DKIM status under "show details" when reading a message). Or additionally as a separate column to be able to add to the message list. So users can quickly see whether the message has been modified during transit from the sender's server.
It would also be great if DKIM settings and key management could be done from the admin UI.
Is there any way to have internal mail signed?
Guess there's not really much point in a single domain setup but for multiple domains and hosting providers this could be useful.
Is DKIM signing on a zimbra server provided as a package within the zimbra installation?
Or does a 3rd party utility need to be installed?