Quarantine Area: Stores messages that you would like to analyze before deciding whether to delete or release to the intended recipient(s).

Archive Area: Stores messages for future reference.

Postponed Queue: Stores messages that will be delivered at a specified time.

Deferred Queue: Stores messages that IMSVA is unable to deliver to the next MTA.

There are 4 values to control IMSVA (postfix) retries. For more information, see Deferred Queue Parameters.

For one deferred email message, the lifetime is 24 hours, the first retry attempt is after 15 minutes, the second retry is after 30 minutes, and all subsequent retries are after 60 minutes. That means there are about 25 retries before the maximal_queue_lifetime value is reached.

Virtual Analyzer Queue: Stores messages that IMSVA submits to Virtual Analyzer before IMSVA receives message analysis results.