This article covers the SPF and DKIM authentication processes for Tutanota 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.

In order to enable DKIM signing for your custom email domain you have to create two DNS entries for your domain.

In the Tutanota Settings, you can now check and manage the DKIM and DMARC configuration for your own email domain(s) under "Global Settings" -> "Custom email domains".

You can also find the instructions on how to set up DKIM and SPF for Tutanota, here.

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

Once you establish that Tutanota 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.