This article covers the SPF and DKIM authentication processes for AuthSMTP 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 enable DKIM on your domain names please login to the control panel and go to Advanced Config -> DKIM Signing.

AuthSMT issues a unique TXT DKIM key for each domain name so your DKIM reputation cannot be affected by other senders.

The DKIM key uses a AuthSMTP specific 'selector' and the signing will only apply to messages sent via your AuthSMTP account.

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

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

Once you establish that AuthSMTP 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.