Set up DKIM | Security & data protection

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1. You might not need to set up DKIM if your domain already has DKIM set up by default, or if you bought your domain from a Google partner when you signed up for Google Workspace. To check if DKIM is already set up for your domain, use one of many free tools available on the internet. “Outbound gateways can be set up to modify outgoing messages, for example by adding a footer to the bottom of every message.” How does DKIM work?

   In DKIM signing

2. Before you begin “You might not need to set up DKIM if your domain already has DKIM set up by default, or if you bought your domain from a Google partner when you signed up for Google Workspace.” If you use outbound gateways, you must verify that the settings don't interfere with DKIM. Outbound gateways can be set up to modify outgoing messages, for example by adding a footer to the bottom of every message. See Set up an outgoing gateway to process outgoing mail.

   In DKIM signing

3. Before you begin “To check if DKIM is already set up for your domain, use one of many free tools available on the internet.” If you use outbound gateways, you must verify that the settings don't interfere with DKIM. Outbound gateways can be set up to modify outgoing messages, for example by adding a footer to the bottom of every message. See Set up an outgoing gateway to process outgoing mail.

   In DKIM signing

4. Set up DKIM “Receiving servers use your public DKIM key to read the DKIM signature and authenticate messages they get from your domain.” On this page

   In DKIM signing

5. You might not need to set up DKIM if your domain already has DKIM set up by default, or if you bought your domain from a Google partner when you signed up for Google Workspace. To check if DKIM is already set up for your domain, use one of many free tools available on the internet. “If you use outbound gateways, you must verify that the settings don't interfere with DKIM.” How does DKIM work?

   In DKIM signing

6. Set up DKIM “Set up DKIM by generating a public DKIM key and adding it to your domain.” On this page

   In Email authentication

7. Open the message in the recipient's inbox and find the entire message header. Note: Steps to view the message header differ for different email applications. To show message headers in Gmail, next to Reply, click More Show original. “Receiving services use different formats for message headers, however the DKIM results should say something like DKIM=pass or DKIM=OK.” Next steps

   In Email authentication

8. Before you begin “To check if DKIM is already set up for your domain, use one of many free tools available on the internet.” If you use outbound gateways, you must verify that the settings don't interfere with DKIM. Outbound gateways can be set up to modify outgoing messages, for example by adding a footer to the bottom of every message. See Set up an outgoing gateway to process outgoing mail.

   In Email authentication testing

9. Open the message in the recipient's inbox and find the entire message header. Note: Steps to view the message header differ for different email applications. To show message headers in Gmail, next to Reply, click More Show original. “In the message header, look for Authentication-Results.” Next steps

   In Email authentication testing

10. Open the message in the recipient's inbox and find the entire message header. Note: Steps to view the message header differ for different email applications. To show message headers in Gmail, next to Reply, click More Show original. “Receiving services use different formats for message headers, however the DKIM results should say something like DKIM=pass or DKIM=OK.” Next steps

    In Email authentication testing