What happens if an entry is listed in both Permitted Senders and Blocked Senders?

In a secure email gateway, when an entry is included in both the Permitted Senders and Blocked Senders lists, the hierarchy established by the gateway dictates that the entry in the Permitted Senders list takes precedence. This means that the email from the individual or domain that is allowed in the Permitted Senders list will be delivered, regardless of the entry in the Blocked Senders list.

The rationale behind this design is rooted in the principle of allowing trusted communications while still maintaining the capacity to block potential threats. By prioritizing the Permitted Senders list, organizations can ensure that important emails from known and trusted sources are not inadvertently blocked by other security measures. Thus, a sender who is both trusted and blocked will still be able to send emails that reach the intended recipient without interference from the security rules intended to filter spam or malicious content.

This setup helps in maintaining communication with essential contacts while providing security against untrusted senders.