What action should be taken for messages in a held queue after the expiration period?

When messages remain in a held queue beyond the designated expiration period, the typical action taken is that they are automatically deleted. This mechanism serves two primary purposes: it helps maintain storage efficiency by preventing the accumulation of unneeded messages and it enhances security by ensuring that outdated or potentially harmful messages do not linger in the system longer than necessary. By automatically removing expired messages, the Secure Email Gateway can ensure that users are interacting only with messages that are relevant and timely.

Other actions, such as notifying users, returning messages to the sender, or archiving for review, may be implemented in different contexts or systems, but they are not the standard response for expired messages in a held queue within most SEG frameworks. These alternatives may introduce unnecessary complexity or user disruption in the email management process.