What should happen to an entry marked on a user's Managed Senders list?

An entry marked on a user's Managed Senders list serves as a user-defined directive for handling email communication from specific senders. When an entry is added to this list, it effectively allows emails from that sender to bypass certain scanning and filtering processes, leading to a higher chance of those emails being delivered to the user's inbox without further scrutiny.

The correct response highlights that entries on the Managed Senders list are always superseded by an Auto Allow policy. This means that if there is an existing Auto Allow policy that includes an email address or domain that the user has also allowed on their Managed Senders list, the coverage provided by the Auto Allow policy takes precedence. Consequently, the Managed Senders list may not fully control the flow of emails as intended in cases where conflicting policies are in place.

In practical terms, this emphasizes the importance of understanding how different aspects of email filtering and policies interact within the Mimecast platform. When managing sender entries, the presence of higher-priority policies like Auto Allow reinforces the need for users to carefully consider and review their managed sender permissions in conjunction with overall email security policies.