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NLog.NLogConfigurationException: BufferingTargetWrapper(Name=mailbuffer): No wrapped Target configured. #6050
Description
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NLog version: 6.0.6
Platform: .NET10/Windows
Current NLog config (xml or C#, if relevant)
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xsi:schemaLocation="NLog NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
internalLogLevel="Error"
internalLogFile="logs\internal.log">
<!-- the targets to write to -->
<targets>
<!-- write logs to file -->
<target xsi:type="File" name="file" maxArchiveFiles="7" fileName="logs\newsticker-cli-${shortdate}.log" layout="${longdate} ${pad:padding=-5:inner=${uppercase:${level}}} ${message} ${exception}" />
<!-- write logs to console -->
<target xsi:type="Console" name="console" layout="${pad:padding=-5:inner=${uppercase:${level}}} ${message} ${exception}" />
<!-- mail -->
<target xsi:type="BufferingWrapper" name="mailbuffer" slidingTimeout="false" bufferSize="10000" flushTimeout="-1">
<target xsi:type="Mail" name="mail"
smtpServer="example.org"
smtpPort="25"
enableSsl="true"
smtpAuthentication="Basic"
smtpUserName="username"
smtpPassword="password"
from="example@example.org"
to="example@example.org"
addNewLines="true"
subject="newsticker-cli ${mdc:item=newsticker-verb} - ${longdate} - ${machinename}"
layout="${longdate} ${pad:padding=-5:inner=${uppercase:${level}}} ${message} ${exception}"
/>
</target>
</targets>
<!-- rules to map from logger name to target -->
<rules>
<logger name="*" minlevel="Info" writeTo="console, file, mailbuffer" />
</rules>
</nlog>- What is the current result?
Emails are no longer being sent due to the error. Worked perfectly in 5.4.
- What is the expected result?
Sending mails.
- Did you checked the Internal log?
NLog.NLogConfigurationException: BufferingTargetWrapper(Name=mailbuffer): No wrapped Target configured.
- Please post full exception details (message, stacktrace, inner exceptions)
- Are there any workarounds? no, just downgrade
- Is there a version in which it did work? 5.4
- Can you help us by writing an unit test?
Activity
snakefoot commentedon Nov 24, 2025
NLog v6 includes several major changes
I'm guessing that NLog doesn't recognize
xsi:type="Mail", and you need to add NLog.Targets.Mail as dependency to your application.virtualdreams commentedon Nov 25, 2025
Hi,
thanks for pointing that out. I added the dependency to the project and sending emails is working again.
I completely overlooked that part in the major changes because I was only focusing on the BufferingWrapper. Perhaps a note could be added to the log asking whether a dependency is missing?
snakefoot commentedon Nov 25, 2025
virtualdreams commentedon Nov 25, 2025
This is the complete log output in my “internal.log” file. I don't see anything with "mail". Only that the target is empty. But it isn't. :)
snakefoot commentedon Nov 25, 2025
Yes unable to resolve target-type should be an error, and not a warning as it is now:
Thank you for the feedback, and helping to improve the NLog-library.
snakefoot commentedon Nov 25, 2025
Created #6051 to improve the InternalLogger output.
snakefoot commentedon Dec 9, 2025
NLog v6.0.7 has been released that upgrades from warning to error when failing to create targets.
Thank you again for the feedback, and helping to improve NLog.
virtualdreams commentedon Dec 9, 2025
Thanks, the content of the exception looks better now.
snakefoot commentedon Dec 10, 2025
Thank you for the fast feedback. Happy the result has been improved.
Not entirely sure why NLogConfigurationException was downgraded to Warn-level by default. But decided here #1143
But if using
ThrowConfigExceptions = truethen NLogConfigurationException will be alerted at Error-level.