Adding SmtpAppender to log4net in Umbraco to email logs of Error or above

gistfile1.xml

<?xml version="1.0"?>
<log4net>
  <root>
    <priority value="Info" />
    <appender-ref ref="AsynchronousLog4NetAppender" />
    <appender-ref ref="SmtpAppender"/>
  </root>
  <!--To Change the way logging works for certain namespaces, insert a new logger like: -->
  <!--
  <logger name="Umbraco.Core">
		<level value="WARN" />
	</logger>-->
  <appender name="AsynchronousLog4NetAppender" type="Umbraco.Core.Logging.AsynchronousRollingFileAppender, Umbraco.Core">
    <file value="App_Data\Logs\UmbracoTraceLog.txt" />
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    <appendToFile value="true" />
    <rollingStyle value="Date" />
    <maximumFileSize value="5MB" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
    </layout>
  </appender>
  
  <appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
    <threshold value="INFO" />
    <to value="[email protected]" />
    <from value="[email protected]" />
    <subject value="My Website Error Report" />
    <smtpHost value="127.0.0.1" />
    <bufferSize value="50" />
    <lossy value="true" />
    <evaluator type="log4net.Core.LevelEvaluator">
      <threshold value="ERROR" />
    </evaluator>
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%newline%date [%thread] %-5level %logger [%property{NDC}] - %message%newline%newline%newline" />
    </layout>
  </appender>
  
</log4net>