What action does the Pause Inbound Deliveries feature perform?

The Pause Inbound Deliveries feature is specifically designed to stop Mimecast from sending inbound emails to your email servers. This action can be useful in situations where there might be a need to perform maintenance on your email servers, troubleshoot issues, or implement updates without the risk of overwhelming the server with incoming messages.

When enabled, this feature ensures that any emails directed to your organization are held by Mimecast rather than being forwarded to your email infrastructure. By pausing inbound deliveries, you can manage your email flow effectively during critical times without losing any incoming messages, which will be queued and delivered once the feature is disabled or once the issues prompting the pause are resolved.

The other options do not describe the specific functionality of the Pause Inbound Deliveries feature. For instance, halting outbound emails or blocking specific senders temporarily addresses concerns unrelated to the pause function, while allowing all inbound emails contradicts the very purpose of the feature, which is to restrict inbound message flow during certain circumstances.