使用gmail SMTP的SmtpAppender log4net [英] SmtpAppender log4net using gmail smtp

问题描述

我用smtpAppender(gmail)配置了log4net.奇怪的问题是，当我在IIS 7.5上部署应用程序时，smtpAppender无法正常工作.

我尝试使用telnet命令测试与gmail smtp的连接.因此，我可以检查是否有任何阻塞，但测试正常.

我的日志配置:

   <log4net>
    <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <file value="C:\logs\MyLog.log"/>
      <appendToFile value="true"/>
      <maximumFileSize value="500KB"/>
      <maxSizeRollBackups value="2"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date %level %logger - %message%newline"/>
      </layout>
    </appender>
    <appender name="SmtpAppender" type="log4net.Appender.SmtpAppender,log4net">
      <to value="[e-mail]" />
      <from value="[e-mail]" />
      <subject value="Error logging message" />
      <smtpHost value="smtp.gmail.com" />
      <port value="587"/>
      <authentication value="Basic" />
      <username value="[e-mail]"/>
      <password value="password"/>
      <EnableSsl value="true" />
      <bufferSize value="1" />
      <lossy value="true" />
      <evaluator type="log4net.Core.LevelEvaluator,log4net">
        <threshold value="ERROR" />
      </evaluator>
      <layout type="log4net.Layout.PatternLayout,log4net">
        <conversionPattern value="%property{log4net:HostName} :: %level :: %message %newlineLogger: %logger%newlineThread: %thread%newlineDate: %date%newlineNDC: %property{NDC}%newline%newline" />
      </layout>
    </appender>
    <root>
      <level value="ALL"/>
      <appender-ref ref="RollingFile"/>
      <appender-ref ref="SmtpAppender"/>
    </root>
  </log4net>
 

调试后，我发现以下异常:

log4net:ERROR [SmtpAppender] ErrorCode: GenericFailure. Error occurred while sending e-mail notification.
System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at
   at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from)
   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at log4net.Appender.SmtpAppender.SendEmail(String messageBody)
   at log4net.Appender.SmtpAppender.SendBuffer(LoggingEvent[] events)

解决方案

尽管这不是您问题的直接答案，但我相信它可以帮助您发现问题. Log4net静默失败，这是设计使然.为了获取有关问题的信息，您可以启用log4net调试

在log4net常见问题解答上检查如何启用log4net内部调试? >

I configured log4net with a smtpAppender (gmail). The weird issue is that the smtpAppender is not working when I deploy the application on IIS 7.5.

I tried to test the connection with the gmail smtp using telnet command. So I can check if anything is blocked but the test worked fine.

My log config:

  <log4net>
    <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <file value="C:\logs\MyLog.log"/>
      <appendToFile value="true"/>
      <maximumFileSize value="500KB"/>
      <maxSizeRollBackups value="2"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date %level %logger - %message%newline"/>
      </layout>
    </appender>
    <appender name="SmtpAppender" type="log4net.Appender.SmtpAppender,log4net">
      <to value="[e-mail]" />
      <from value="[e-mail]" />
      <subject value="Error logging message" />
      <smtpHost value="smtp.gmail.com" />
      <port value="587"/>
      <authentication value="Basic" />
      <username value="[e-mail]"/>
      <password value="password"/>
      <EnableSsl value="true" />
      <bufferSize value="1" />
      <lossy value="true" />
      <evaluator type="log4net.Core.LevelEvaluator,log4net">
        <threshold value="ERROR" />
      </evaluator>
      <layout type="log4net.Layout.PatternLayout,log4net">
        <conversionPattern value="%property{log4net:HostName} :: %level :: %message %newlineLogger: %logger%newlineThread: %thread%newlineDate: %date%newlineNDC: %property{NDC}%newline%newline" />
      </layout>
    </appender>
    <root>
      <level value="ALL"/>
      <appender-ref ref="RollingFile"/>
      <appender-ref ref="SmtpAppender"/>
    </root>
  </log4net>

After debugging I found the below exception:

log4net:ERROR [SmtpAppender] ErrorCode: GenericFailure. Error occurred while sending e-mail notification.
System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at
   at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from)
   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at log4net.Appender.SmtpAppender.SendEmail(String messageBody)
   at log4net.Appender.SmtpAppender.SendBuffer(LoggingEvent[] events)

解决方案

Although this is not a direct answer to your question, I believe it could help you to detect the problem. Log4net fails in silence and this is by design. In order to get information about what's wrong you could enable log4net debugging

Check How do I enable log4net internal debugging? on log4net FAQS

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