title: Log4Net email appender is sending emails when the threshold has not been met
body: <p>I've got an appender that I thought should be configured to only send emails when logging at the ERROR level.</p>
  
  <p>But I keep getting emails from the application which don't have any entries with the ERROR log level.</p>
  
  <p>Is there something in this configuration that is "fooling" the appender into sending? Something to do with the lossy setting perhaps?</p>
  
  <pre><code>&lt;appender name="SmtpErrorAppender" type="log4net.Appender.SmtpAppender"&gt;
      &lt;to value="myemail@somewhere.com"/&gt;
      &lt;from value="someapp@config.com" /&gt;
      &lt;subject value="Service Error" /&gt;
      &lt;authentication value="None" /&gt;
      &lt;smtpHost value="127.0.0.1" /&gt;
      &lt;port value="25" /&gt;
      &lt;lossy value="false" /&gt;
      &lt;evaluator type="log4net.Core.LevelEvaluator"&gt;
          &lt;threshold value="ERROR" /&gt;
      &lt;/evaluator&gt;
      &lt;layout type="log4net.Layout.PatternLayout"&gt;
          &lt;conversionPattern value="%newline %-5level %date %message%newline%newline%newline" /&gt;
      &lt;/layout&gt;
  &lt;/appender&gt;
  &lt;root&gt;
      &lt;level value="DEBUG"/&gt;
      &lt;appender-ref ref="RollingLogFileAppender"/&gt;
      &lt;appender-ref ref="SmtpErrorAppender"/&gt;
  &lt;/root&gt;
  </code></pre>