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Go to JIRA Administration>System>Logging and profiling
Under Default Loggers, click "configure logging level for another package"
For Package name enter com.riadalabs.jira.plugins.notificationassistant.NotificationEmailHandlerImpl
For Package name enter com.riadalabs.jira.plugins.notificationassistant.NotificationManagerImplFor Logging Level select INFO or DEBUG depending on how much logging they want (DEBUG for more)
Press Add to save
Email log output will now be added to JIRA's own atlassian-jira.log file
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