DMARC requires the domain in the “From” address of the email (what the recipient sees) to match the information authenticated by SPF or DKIM. This is called DMARC alignment.

Certain email service providers require bulk email-sending domains to authenticate their emails with both SPF and DKIM, in addition to configuring one of these authentication methods for DMARC alignment. You can read more about these bulk sender requirements here.

To start setting up email authentication, please contact IIJ Secure MX Service's support team, who will provide the necessary records needed for authenticating your emails.

Publish the DKIM key record in Valimail following the steps from the article below.

Once you establish that IIJ Secure MX Service is an authorized sender for your domain, you will need to configure the service as an Enabled Sender in your domain's configuration.

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

If you have any questions about configuring email authentication for this service, please don't hesitate to reach out to Valimail Product Support at [email protected]. We are always happy to assist you in any way we can.