Which of the following statements about Blocked Senders and Permitted Senders is correct?

The statement that Permitted Senders entry always supersedes Blocked Senders is correct because it highlights the essential functionality of email security systems like Mimecast, which are designed to ensure that legitimate communications are not hindered by overly aggressive filtering.

When an email address is added to the Permitted Senders list, it signifies that emails from that sender are allowed to bypass the security checks that would otherwise apply. This ensures that important emails from known and trusted sources are delivered directly to the recipient's inbox, regardless of any filtering rules that may be in place.

In contrast, a Blocked Senders list is meant to prevent unwanted or harmful emails from reaching users, but when a sender is part of both lists, the system is configured to prioritize the Permitted Senders list. This means that even if a sender is on the Blocked list, their messages won't be blocked if they are also on the Permitted list.

This design helps to reduce false positives and enhances the overall user experience, as it guarantees that trusted communications are not unduly disrupted, maintaining a balance between security and accessibility.