Please follow these steps to remove the emails from phishing quaratine: 1. Open PowerShell connect to Exchange online service. Use Get-QuarantineMessage -MessageID check if the email is existing. Use Delete-QuarantineMessage -Identity to delete the email.
By default, the Barracuda Email Security Gateway does not quarantine incoming messages, but you may want to enable quarantine if, for example, your organization requires it, or if you want to reduce load on the mail server while giving users a chance to determine what they consider to be 'spam' or 'not spam'. There are three options available for configuring quarantine with the Barracuda Email Security Gateway as described below, with the pros and cons of each. Turning Quarantine OffBarracuda Networks recommends disabling quarantine unless, for example, your organization has a business requirement to provide quarantine of messages suspected to be spam or you don’t want those messages stored on the mail server.
Disabling quarantine means less management either by the administrator or by the user and, in the case of per-user quarantine, saves system resources that would otherwise be used to store the messages until the user delivers or deletes them.An alternative to using quarantine is tagging email that may be spam based on scoring or are otherwise identified as possible spam. Note that with global quarantine, users will have no control over whitelisting or blocklisting of email addresses, which they do have with per-user quarantine. Allowing them this control by using per-user quarantine can help reduce the number of messages processed by the Barracuda Email Security Gateway. However, if using global quarantine, users can communicate domains, IP addresses or email addresses that should be white or blocklisted to the administrator to configure at the global level. Using Per-user QuarantineProviding a user with a quarantine inbox gives them greater control over how their messages are quarantined, but also requires them to manage their quarantine inbox on the Barracuda Email Security Gateway. Since per-user quarantine entails storing quarantined messages on the Barracuda Email Security Gateway until the user delivers or deletes, them, you may want to only provide a quarantine inbox to a subset of power users.
![Quarantine Quarantine](https://cookbook.fortinet.com/wp-content/uploads/2018/01/FML-Cloud.png)
For details about managing the quarantine inbox, please see theWhen enabling per-user quarantine on the Barracuda Email Security Gateway, keep in mind that quarantined email stored on the Barracuda Email Security Gateway requires storage capacity, so system load will vary with the average size of emails.If the email patterns of your organization are such that many emails include large attachments (as with architecture firms, marketing firms, etc.), the system may push the edge of performance more quickly than if emails tend to be small in size. For the Barracuda Email Security Gateway 300 and higher, be sure to set a Retention Policy (see the USERS Retention Policies page) before enabling per-user quarantine in order to prevent running out of quarantine space. Where Do the Quarantined Messages Go?If the administrator sets Quarantine Type to Per-User on the BASIC Quarantine page and the New User Quarantine State feature is set to On, the Barracuda Email Security Gateway will automatically create quarantine accounts for all users listed in the authentication server or local database as configured at the domain level.
Account holders can then log into the Barracuda Email Security Gateway and view their Quarantine Inbox to view and take actions with quarantined messages.If a user's quarantine inbox is disabled (by an administrator or a Domain Admin or Helpdesk account, or by the user), emails sent to that user that would normally have been placed in quarantine will simply be delivered to the user's regular mailbox with the subject line prepended with a quarantine tag. Linking Domains for One Quarantine InboxIn some cases it may be practical to direct all quarantined email to one quarantine inbox on the Barracuda Email Security Gateway. You may employ one or more 'power users' to manage it, or allow all users to log in to the same inbox.Using only one quarantine inbox for all users greatly simplifies management of per-user quarantine because you only have to configure user features (from the BASIC User Features page) for ONE inbox. The Linking Domains feature, configurable on the BASIC Quarantine page, allows the option for all domains protected by this Barracuda Email Security Gateway be treated as if they were alternate names for the default domain name for the system.
So, for example, if the Default Domain for the system as specified on the BASIC IP Configuration page is mybarracuda.com, then [email protected] will be treated as [email protected] when determining user validity and preferences, and will have a quarantine inbox under the name [email protected]. The Quarantine InboxWhen an account holder with the User role logs in to the Barracuda Email Security Gateway, they will see the QUARANTINE INBOX and PREFERENCES tabs. They can view and choose to whitelist, deliver or delete quarantined emails from the QUARANTINE INBOX page and configure their account settings from the PREFERENCES page to the extent that their account permissions allow as described below under. Domain Admin and Helpdesk account holders will see the QUARANTINE INBOX and PREFERENCES tabs when they click the Manage Account link in the upper-right corner of the web interface.For details on how all account holders log into and manage their quarantine inbox, please see the Alias LinkingThis feature allows one quarantine account to receive quarantined email for multiple accounts, using the Explicit Users to Accept For section of the USERS Valid Recipients page. Note that this account, if entered on one line only with associated accounts for which it should receive email, is not considered a Valid Recipient.
This account needs to be added on a separate line to also be considered a Valid Recipient. The quarantine account that receives quarantined email for other accounts does not need to belong to the same domain as the others.
Exchange 2010 added multiple features to improve the resiliency of messaging services. Notable additions included client throttling to ensure that a single mailbox would not consume excessive resources and mailbox quarantine.Mailbox quarantine is enabled by default, and the first time a lot of admins discover the feature is when a mailbox gets quarantined and the user loses access to their mailbox. In Exchange 2010 the default quarantine value is 6 hours. Think about that for a minute, if a mailbox gets quarantined at 09:00, then it will exit quarantine at 15:00. Whilst a mailbox is quarantined there is no access to the mailbox.
Only by passing the open as admin flag can it be opened. The mailbox cannot be moved, indexed, opened in OWA/EAS/Outlook or anything whilst it is quarantined. Quarantined really does mean quarantined.Some customers may be OK with the Exchange 2010 6 hour default quarantine duration, others not so much. TechNet also states that Exchange 2013 has a.Lets take a look at the feature to investigate what we can configure.
Some other questions that we want to answer are:. How do I test quarantineDefend The FlagExchange 2010 has a single store.exe process where all the databases are loaded, so it is imperative that this critical process is as well defended as possible. If the store were to crash or get hung up on a single thread then all mailboxes would be affected. Exchange 2013 implements multiple store.exe processes to mitigate impact. By analysing the status of mailbox threads, Exchange can determine if a single mailbox is impacting the store. It is possible that a single mailbox with corrupted data could cause store to crash or become unresponsive.
If this happens repeatedly, then that would be considered a poison mailbox. As described on TechNet there are a couple of items that store considers naughty:.