Mimecast Queue Management

To check the Mimecast email queue for stuck messages, monitor both inbound and outbound queues to identify delivery delays. The system differentiates message states like queued, retrying, deferred, and held to help isolate backlog conditions.

Emails deferred in Mimecast indicate delivery delays often caused by recipient server issues or policy blocks. Diagnose deferred messages by examining message age, retry counts, and last error codes to determine the specific delivery failure cause.

The best way to diagnose a Mimecast email delivery backlog is to identify messages with a long oldestMessageAge. Analyzing this metric alongside message states helps detect potential delivery problems and pinpoint where the queue is congested.

Mimecast queue states directly affect email delivery by tracking message progress. Held messages are suspended pending action, while retrying messages attempt redelivery, and differentiating these states from queued or deferred helps isolate specific delivery failures.

You can use Mimecast queue monitoring to identify delivery failure causes by examining last error codes. Analyzing these codes alongside message age and retry counts helps determine if recipient server issues or policy blocks are preventing delivery.

A high retry count on a Mimecast message indicates repeated delivery attempts have failed, often pointing to persistent recipient server issues. Reviewing retry counts alongside last error codes helps diagnose why the message remains stuck in the queue.