You can release messages from the local quarantine in the following ways:
Release messages by email
Release messages to a file
By default, Mail Security version 7.5 does not re-scan the items that are quarantined due to antivirus and file filtering violations, once they are released. However, if the items are quarantined due to content filtering violations, Mail Security version 7.5 scans these items only for virus policies and file filtering conditions. This behavior is configurable through registry.
Messages that are released from the quarantine are not filtered for spam and content filtering rules.