Email Security - Cloud can retroactively scan emails from the past 7 days for native domains. Included mailboxes must be configured and selected prior to scanning. The throughput of the scan is adjusted to avoid impact on real-time message scanning.
Note
This feature is most effective for newly configured domains because it can identify attacks against messages not yet scanned by the platform. Depending on the timing of the scan, some messages may appear in the email trace multiple times.
This feature is for included mailboxes only.
To retroactively scan a mailbox:
Select Domains from the Configuration menu in the top navigation bar.
In the Domains page, click on the name of a native domain.
Ensure that Include Mailboxes is selected.
Under Mailbox Settings, select Scan Back next to Included Mailboxes. Each domain listed under Included Mailboxes is scanned.