End users are receiving alerts from the Secure Mail flow system of the type:

Trend Micro Hosted Email Security quarantined spam <dd/mm/yyyy> 09:00:00 for <recipient>


These are quarantined message report digest which has been configured to be delivered to end user's mailboxes 3 times a day.

Using these reports, users can view mail not delivered to their mailboxes and also release them from the quarantine.