OnCommand Unified Manager 6.x
The 'volume autosize' feature allows a volume to automatically grow and shrink depending on the amount of data in the volume. In some cases, the administrator would like to be aware of any autosize actions that occur. As of OnCommand Unified Manager (UM) 6.4, this is not a feature (log a support case asking for it in BUG 969168) so as a next best solution is to configure email notifications on the cluster.
This article provides the steps to configure email notifications in case of autosize success and failure.