This article covers the SPF authentication processes for Retarus and how they are managed in Valimail Enforce. While only one of the two authentication methods is required for an email to pass DMARC, our recommendation is to configure both whenever possible.
For now, Retarus does not support DKIM signing for the customer's domain.
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Configuring SPF authentication for your Retarus emails
That's it! Starting now all new Retarus emails will pass DMARC authentication via SPF as long as they are being sent in an aligned manner.
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.