code: public java.util.List<String> getRecipients() {
          if (recipients == null) {
              recipients = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return recipients;
      }
docs: <p>
  The recipient domains and email addresses that the receipt rule applies to. If this field is not specified, this
  rule will match all recipients under all verified domains.
  </p>
  
  @return The recipient domains and email addresses that the receipt rule applies to. If this field is not
  specified, this rule will match all recipients under all verified domains.