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https://issues.apache.org/jira/browse/LOG4J2-1450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15355859#comment-15355859
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Benjamin Jaton commented on LOG4J2-1450:
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This:
{noformat} "subject" : "$${prefix:email.subject}"{noformat}
doesn't work for me. It shows "${prefix:email.subject" in the actual subject of
the email.
My use case is that there is a running JVM that does some monitoring tasks, the
user can use a different app to configure the SMTP
settings/recipient/subject/...
When he changes those settings, the monitoring JVM can't dynamically update
those email settings, it would have to reload the conf entirely.
> SMTPAppender support for runtime lookup
> ---------------------------------------
>
> Key: LOG4J2-1450
> URL: https://issues.apache.org/jira/browse/LOG4J2-1450
> Project: Log4j 2
> Issue Type: Improvement
> Reporter: Benjamin Jaton
>
> http://logging.apache.org/log4j/2.x/manual/configuration.html#RuntimeLookup
> "Not all elements support resolving variables at runtime."
> The SMTPAppender doesn't support using:
> {noformat}{
> "type" : "smtp",
> "name" : "EmailAppender",
> "subject" : "$${email.subject}",
> "to" : "$${email.recipient}",
> "from" : "$${email.from}",
> "smtpProtocol" : "$${email.smtp.protocol}",
> "smtpHost" : "$${email.smtp.host}",
> "smtpPort" : "$${email.smtp.port}",
> "smtpUsername" : "$${email.smtp.username}",
> "smtpPassword" : "$${email.smtp.password}"
> }{noformat}
> However that would be very useful so that the user doesn't have to reload the
> whole log4j2 configuration when the SMTP parameters have changed.
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