This article covers the SPF and DKIM authentication processes for One.com 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.

If you're not using one.com's name servers but are using our mail servers, you can still add DKIM to your domain. You need to add 4 specific CNAME records. Please contact their support to get the exact values you need for your domain.

You can also find more information on how to set up DKIM and SPF for One.com, here.

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

Once you establish that One.com 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.