private void logMail(SimpleMailMessage msg) {
   log.info(
       "Mail Test-Mode: Would send mail to="
           + arrayToString(msg.getTo())
           + " with subject="
           + msg.getSubject());
   log.debug(
       "Mail Test-Mode: from="
           + msg.getFrom()
           + " , cc="
           + msg.getCc()
           + " , reply-to="
           + msg.getReplyTo());
   log.debug("Mail Test-Mode: text='" + msg.getText() + "'");
 }