GitHub user ppkarwasz added a comment to the discussion: Add Support for Custom Headers in SMTP Appender #3704
What version of the JDK you are using? It seems that your compiler does not support `--release 8`. Can you check: ```shell java --version javac --version printenv JAVA_HOME ``` GitHub link: https://github.com/apache/logging-log4j2/discussions/4053#discussioncomment-15938224 ---- This is an automatically sent email for [email protected]. To unsubscribe, please send an email to: [email protected]
