Even thou we can customize a dkim record using the TXT selection instead of the PublicKey selection, in PublickKey selection setup UI add more out of the box config selections for other standard dkim tags like: * "k" Key type. Most often "rsa", which is the default, but "ed25519" was added in RFC 8032. * "s" Service type. The type of service this key may be used for, may be "*" for all services or "email". Not to be confused with the "s" tag that can appear in the DKIM-Signature field of an email header! * "t" Flags. A colon-separated list of flags. Valid flag values are "y" and "s". Use "y" to indicate that DKIM is in testing mode. Use "s" to indicate that the domain in the DKIM-Signature must exactly match the domain the message was sent from (and must not be a subdomain).