If configured for per-user quarantine, the email is stored on the antispam servers. A "Spam Quarantine Summary" report will be sent to any users who have at least one email “quarantined”. Admins can configure the timing of these quarantine digest messages in a very flexible way – up to 24 times a day!. Each user can decide for themself whether they would like to release the quarantined messages and / or classify them as spam. A second option, instead, is that the Domain Manager can receive ALL quarantined email (sent to a single mailbox specified by the Domain Manager upon sign-up). With the exception of viruses, email messages are stored in their entirety, and can be retrieved should the need arise. From the designated quarantine mailbox the Domain Manager can determine what action to take against the quarantined emails.