When you have already made a zone contract with "IIJ Managed DNS Service" for the domain to be supported by sender domain authentication, you are to register SPF, DKIM, and DMARC records for sender domain authentication with the relevant zone. However, no additional cost for record registration will be generated.

If you have not signed up for any zones of the target domain, you will need to make a zone contract additionally in "IIJ Managed DNS Service" and therefore cost for the zone addition will be generated. Refer to "IIJ DNSプラットフォームサービス" (Japanese Only) for information on the cost.

For information on the contract, contact your IIJ sales representative or contact us from the following site.

• Contact Information | Internet Initiative Japan Inc.