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Mail Quarantine types

The Mail Quarantine manager is available for all three quarantine types:

Local quarantine

Quarantine mailbox

Microsoft Exchange quarantine

You can see the Mail Quarantine contents of the in the Mail Quarantine manager. Additionally, you can view the local quarantine in the Mail Quarantine Web interface.

Store messages for non-existent recipients

This setting applies to messages marked to be quarantined by Antivirus protection, Antispam protection or based on Rules. When enabled, messages that were sent to recipients that do not exist in your Active Directory are stored in Mail quarantine. Disable this feature if you do not want to keep these messages in your Mail quarantine. When disabled, messages to unknown recipients will be dropped silently.

See the example if you want to have all messages to non-existent recipients quarantined.

Log release actions

When releasing items from mail quarantine, these actions are written to the Mail server protection log within Log files. If you are using ESET PROTECT, ESET Management Agent collects information from the Mail server protection log, and you can use the Reports feature in ESET PROTECT to further handle the data as needed.

Skip evaluation of rules when releasing emails

If you want to release a message from quarantine, it will not be evaluated by rules. This prevents the message from being put back into quarantine, and the released message will be successfully delivered to the recipient. This feature is only used when the Administrator releases the message. If you disable this feature, or if a user other than the Administrator releases a message, the message will be evaluated by rules.


If you run a clustered environment and release a message from quarantine, the message will not get quarantined again by the other ESET Mail Security nodes. It is achieved by the synchronization of the rules between the cluster nodes.

Mail signature seed for multi-server environment

You can skip the evaluation of rules when releasing emails in a multi-server environment. Type the same seed value (a string of characters, something like a passphrase) on all servers where you want to establish trust.

Format for attachment envelope

When an email message is released from quarantine, it is attached to a new message (attachment envelope), which is then delivered to the recipient. The recipient receives the original message that is released from mail quarantine as an attachment. You can use the pre-defined envelope format or modify it to your requirements using the available variables.

Use ESET Cluster to store all quarantined messages on one node

If you are using ESET Cluster, this option is available. We recommend that you use this function, because it allows you to keep the Local quarantine file store in one place, the master node.

Master node

Specify which server is the master node of your ESET Cluster. You will then access and manage the Local quarantine on the master node (you can use Mail Quarantine manager from the main program window or Mail Quarantine Web interface).