Log4NetExtensions

A BurstFilter for log4net. Use this to throttle SmtpAppenders and other Appenders.

NuGet package available at log4net.BurstFilter

Example configuration

<log4net>
    <appender name="SMTPAppender" type="log4net.Appender.SmtpAppender,log4net">
      <bufferSize value="1"/>
      <authentication value="Basic" />
      <to value="to@example.com" />
      <from value="from@example.com" />
      <subject value="Automatmail: system X is totally broken, please fix" />
      <smtpHost value="smtp.example.com" />
      <username value="username"/>
      <password value="password"/>
      <lossy value="false" />
      <threshold value="ERROR"/>
      <filter type="Kentor.Log4NetExtensions.BurstFilter,Kentor.Log4NetExtensions.BurstFilter">
	    <!-- Allow two mails a minute on average, with bursts up to 20 mails -->
        <BurstLength value="00:10:00"/>
        <BurstSize value="20"/>
      </filter>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%property{log4net:HostName}%newline%date user:%aspnet-request{AUTH_USER} %-5level %logger %newline %message%newline%exception%newline%newline"/>
      </layout>
    </appender>
    <root>
      <level value="ALL" />
      <appender-ref ref="SMTPAppender" />
    </root>
</log4net>

Read more about the BurstFilter here