log4net smtp appender not sending emails

问题:

I'm trying to implement log4net to send email.
The following is my code but it's not sending emails.

 <appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">   <to value="...." />   <from value="..." />   <subject value="Logging Message" />   <smtpHost value="smtp.gmail.com" />   <port value="465"/>   <authentication value="Basic" />   <username value="..."/>   <password value="..."/>   <EnableSsl value="true" />   <bufferSize value="1" />   <lossy value="true" />   <evaluator type="log4net.Core.LevelEvaluator">     <threshold value="WARN"/>   </evaluator>   <layout type="log4net.Layout.PatternLayout">     <conversionPattern value="%date [%thread] %level %logger - %message%newline%exception" />   </layout> </appender> 

and

<root>   <level value="WARN" />   <appender-ref ref="SmtpAppender" /> </root> 

in the AssemblyInfo.cs

 [assembly: log4net.Config.XmlConfiguratorAttribute(Watch = true)] 

and that's how I create the log object

  private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); 

This configuration is working fine for file output i.e. RollingFileAppender but not for SmtpAppender.

N i have tried many solutions from the internet but were not really helpful.

Please show me the right directions. thankx in advance :)

回答1:

I'm using a very similar appender for SMTP messages to Gmail, but in my case I use a different port:

<port value="587"/> 

All the other settings are the same, so give that a try and see if it works for you. It's the port Gmail uses for TLS, referenced here.

回答2:

Please see my working example. If you use 2-factor authentication with GMail dont forget to generate a password and use it here:

<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">   <to value="****" />   <from value="****" />   <subject value="Crash log" />   <smtpHost value="smtp.gmail.com" />   <authentication value="Basic" />   <port value="587" />   <username value="****" />   <password value="****" />   <bufferSize value="10" />   <EnableSsl value="true"/>   <lossy value="true" />   <threshold value="DEBUG" />   <evaluator type="log4net.Core.LevelEvaluator">     <threshold value="WARN"/>   </evaluator>   <layout type="log4net.Layout.PatternLayout">     <conversionPattern value="%date{dd/MM/yyyy hh:mm:ss.fff}&#9;%-5level&#9;%-15logger&#9;%message%newline" />   </layout> </appender> 

Hope it helps.

回答3:

For those running into issues with SmtpAppender I would recommend putting the following into your appSettings node.

<appSettings>   <add key="log4net.Internal.Debug" value="true"/> </appSettings> 

It will then output diagnostics such as this below to point you in the right direction

log4net: Setting Property [From] to String value [tomas@kodi.is] log4net: Setting Property [Subject] to String value [Kodiak OMS Shortcode service] log4net: Setting Property [SmtpHost] to String value [mail.sip.is] log4net: Setting Property [Port] to Int32 value [25] log4net: Setting Property [BufferSize] to Int32 value [1] log4net: Setting Property [EnableSsl] to Boolean value [True] log4net: Setting Property [Threshold] to Level value [DEBUG] log4net: Setting Property [Lossy] to Boolean value [False] log4net: Converter [message] Option [] Format  [min=-1,max=2147483647,leftAlign=False] log4net: Converter [newline] Option [] Format [min=-1,max=2147483647,leftAlign=False] log4net: Setting Property [ConversionPattern] to String value [%utcdate [%level] - %message%newline%exception] log4net: Converter [utcdate] Option [] Format [min=-1,max=2147483647,leftAlign=False] log4net: Converter [literal] Option [ [] Format [min=-1,max=2147483647,leftAlign=False] log4net: Converter [level] Option [] Format [min=-1,max=2147483647,leftAlign=False] log4net: Converter [literal] Option [] - ] Format [min=-1,max=2147483647,leftAlign=False] log4net: Converter [message] Option [] Format [min=-1,max=2147483647,leftAlign=False] log4net: Converter [newline] Option [] Format [min=-1,max=2147483647,leftAlign=False] log4net: Converter [exception] Option [] Format [min=-1,max=2147483647,leftAlign=False] log4net: Setting Property [Layout] to object [log4net.Layout.PatternLayout] log4net: Created Appender [EmailLog] log4net: Adding appender named [EmailLog] to logger [EmailLogger]. log4net: Hierarchy Threshold [] log4net:ERROR [SmtpAppender] ErrorCode: GenericFailure. Error occurred while sending e-mail notification. System.Net.Mail.SmtpException: Server does not support secure connections.    at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)    at System.Net.Mail.SmtpTransport.GetConnection(ServicePoint servicePoint)    at System.Net.Mail.SmtpClient.GetConnection()    at System.Net.Mail.SmtpClient.Send(MailMessage message)    at log4net.Appender.SmtpAppender.SendEmail(String messageBody)    at log4net.Appender.SmtpAppender.SendBuffer(LoggingEvent[] events) 

文章来源: log4net smtp appender not sending emails