What is the first location to check for confirming inbound and/or outbound mailflow in Mimecast?

The first location to check for confirming inbound and/or outbound mail flow in Mimecast is the Accepted Messages. This area provides a record of messages that have successfully passed through Mimecast's filters and have been acknowledged as delivered to the intended recipient. By reviewing Accepted Messages, administrators can ascertain that the email traffic they expect is flowing correctly and that there are no immediate delivery issues.

Checking this section gives a clear indication of the effectiveness of the mail flow, as it includes details about the messages that have been processed and accepted by the system. If there are concerns about whether an email was sent or received, this is the primary area to verify the message's status, helping in troubleshooting and ensuring communication continuity.

The other options serve specific purposes in mail flow management; for example, Blocked Messages show emails that have been blocked due to policy or security settings, Rjected Messages indicate messages that did not make it through due to delivery issues, and Delivery Reports offer insights into the status of specific messages but are not the first line of confirmation for general mail flow as Accepted Messages are.