log4net SmtpAppender with SubjectLayout

NuGet: https://nuget.org/packages/log4net.Appender.SmtpAppenderWithSubjectLayout

Subject layout example

XmlConfigurator.Configure();
ILog logger = LogManager.GetLogger("logger");
logger.Error("Some error");

<appender name="SMTPAppender" type="log4net.Appender.SmtpAppenderWithSubjectLayout, log4net.Appender.SmtpAppenderWithSubjectLayout">
  <!-- ... -->
  <subjectLayout>
    <conversionPattern value="Local // %p: %date [%c]" />
  </subjectLayout>
  <!-- ... -->
</appender>

Email subject: Local // ERROR: 2013-05-14 23:58:05,847 [logger]