Mail Sessions: Targets
This page indicates on which WebLogic Server instances or clusters the mail session is accessible. Only applications that have been deployed to the selected servers or clusters can use this mail session.
When you target all or part of a cluster, the Administration Console initiates a two-phase deployment. In general, such a deployment ensures that if the deployment fails for one active server, it fails for all active servers.
You can temporarily disable this mail session by un-targeting it from all WebLogic Server instances and clusters.