1. Go to Outbound Protection > DomainKeys Identified Mail (DKIM) Signing.
  2. From the list of DKIM signing domains, click a domain that you want to edit.
  3. Modify the DKIM signing settings as required.
    Note:

    For details about the settings, see Adding DKIM Signing Settings.

    If you regenerate a key pair, remember to publish it to your DNS server.

  4. Click Save.