docs: public void sendEmail(final String theTo, final String theFrom, final String theSubject,
                            final String theContent) {
          if (null == smtpServerSetup) {
              throw new IllegalStateException("Can not send mail, no SMTP or SMTPS setup found");
          }
          GreenMailUtil.sendTextEmail(theTo, theFrom, theSubject, theContent, smtpServerSetup);
      }