code: public void enableDKIM(EnableDKIMRequest request) {
          checkNotNull(request, "object request should not be null.");
          assertStringNotNullOrEmpty(request.getDomainName(), "object domainName should not be null or empty");
  
          InternalRequest internalRequest =
                  this.createRequest("verifiedDomain", request, HttpMethodName.PUT, request.getDomainName());
          internalRequest.addParameter("enable", "enableDkim");
  
          this.invokeHttpClient(internalRequest, SesResponse.class);
      }
docs: Enable the DKIM
  <P>
  Disable or enable DKIM the specifical email or domain, if enabled then SES will add DKIM for all the email about
  the email and domain.
  
  @param request The request object which includes domain to enable