This article covers the SPF and DKIM authentication processes for Zimbra and how they are managed in Valimail. While only one of the two authentication methods is required for an email to pass DMARC, our recommendation is to configure both whenever possible.

To setup DKIM for your Zimbra emails, please follow the steps described in this article, here.

You can find more detailed information on how to add a DKIM key in Valimail, here:

Once you establish that Zimbra is an authorized sender for your domain, you will need to add the service in your Enabled Senders.

You will find more detailed information on how to add a service for your domain in Valimail, here:

Note: We encourage you to use the comment section for any useful information about your sending service, such as the name of the service owner, change request ticket numbers, etc.