User Guide

Receiving Messages from the Barracuda Spam Firewall

The Spam Firewall sends you the following two types of messages:

Greeting Message

The first time the Barracuda Spam Firewall quarantines an email intended for you, the system sends you a greeting message with a subject line of User Quarantine Account Information. The greeting message contains the following information:

Welcome to the Barracuda Spam Firewall. This message contains the information you will need to access your Spam Quarantine and Preferences.

Your account has been set to the following username and password:

Username: <your email address>

Password: <your default password>

Access your Spam Quarantine directly using the following link:

The Barracuda Spam Firewall automatically provides your login information (username and password) and the link to access the quarantine interface. You should save this email because future messages from the system do not contain your login information.

Quarantine Summary Report

The Barracuda Spam Firewall sends you a daily quarantine summary report so you can view the quarantined messages you did not receive. From the quarantine summary report you can also add messages to your whitelist, delete messages, and have messages delivered to your inbox.

The following figure shows an example of a quarantine summary report.

Screendump of a quarantine summery mail from the spamfirewall

Using the Quarantine Interface

At the end of every quarantine summary report is a link to the quarantine interface where you can set additional preferences and classify messages as spam and not spam.

Logging into the Quarantine Interface

  1. Click the link provided at the bottom of the Quarantine Summary Report (displayed above).
    Result: The login page appears.
  2. Enter your username and password, and click Login.

Your login information resides in the greeting message sent to you from the Barracuda Spam Firewall.

Managing your Quarantine Inbox

After logging into the quarantine interface, select the QUARANTINE INBOX tab to view a list of your quarantined messages. When you first start using the quarantine interface, you should view this list on a daily basis and classify as many messages as you can.

The Barracuda Spam Firewall has a learning engine that learns how to deal with future messages based on the ones you classify as spam and not spam. The learning engine becomes more effective over time as you teach the system how to classify messages and as you set up rules based on your whitelist and blacklist.

Clicking on an email displays the message.

The following table describes the actions you can perform from this page.

Action Description

Delivers the selected message to your standard email inbox.

Note: If you want to classify a message or add it to your whitelist, make sure to do so before delivering the message to your inbox. Once the Barracuda Spam Firewall delivers a message, it is removed from your quarantine list.


Adds the selected message to your whitelist so all future emails from this sender are not quarantined unless the message contains a virus or banned attachment type.

The Barracuda Spam Firewall adds the sending email address exactly as it appears in the message to your personal whitelist.

Note that some commercial mailings may come from one of several servers such as, and a subsequent message may come from

See the section on managing your whitelists and blacklists for tips on specifying whitelists with greater effectiveness.


Deletes the selected message from your quarantine list. The main reason to delete messages is to help you keep track of which quarantine messages you have reviewed.

You cannot recover messages you have deleted

Classify as
Not Spam

Classifies the selected message as not spam.

Note: Some bulk commercial email may be considered useful by some users and spam by others. Instead of classifying bulk commercial email, it may be more effective to add it to your whitelist (if you wish to receive such messages) or blacklist (if you prefer not to receive them).

Classify as

Classifies the selected message as spam.

Changing your User Preferences

After logging into your quarantine interface, you can use the PREFERENCES tab to change your account password, modify your quarantine and spam settings, and manage your whitelist and blacklist.

Changing your Account Password

To change your account password, do one of the following:

Note: Changing your password breaks the links in your existing quarantine summary reports so you cannot delete, deliver, or whitelist messages from those reports. New quarantine summary reports will contain updated links that you can use the same as before.

Changing Your Quarantine Settings

The following table describes the quarantine settings you can change from the PREFERENCES -> Quarantine Settings page.

Quarantine Setting Description
Notification Interval

The frequency the Barracuda Spam Firewall sends you quarantine summary reports. The default is daily. The Barracuda Spam Firewall only sends quarantine summary reports when one or more of your emails have been quarantined.

If you select Never, you can still view your quarantined messages from the quarantine interface, but you will not receive quarantine summary reports.

Notification Address

The email address the Barracuda Spam Firewall should use to deliver your quarantine summary report.

Default Language

The language in which you want to receive your quarantine notifications.

This setting also sets the default encoding for handling unknown character sets during filtering. All email notifications from the Barracuda Spam Firewall are in UTF8 encoding.

Managing your Bayesian Database

From the PREFERENCES -> Spam Settings page you can manage your Bayesian database. From there you can reset the Bayesian rules learned by the Barracuda Spam Firewall or create a backup of or restore your Bayesian database.

The Spam Settings page will also list the number of message classified as spam and not spam.

The following table describes the quarantine settings you can change from the PREFERENCES -> Spam Settings page.

Setting Description
Reset Bayesian Database

Click Reset to remove your Bayesian rules learned by the Barracuda Spam Firewall.

Backup Bayesian Database

Click Backup to download a copy of your Bayesian database to your local system. This backup copy can then be uploaded to any Barracuda Spam Firewall, in the case of a corrupt Bayesian installation.

Restore Bayesian Database

Click Browse to select the backup file containing your Bayesian database, and then click Upload Now to load the Bayesian settings to the Barracuda Spam Firewall.

The backup file does not need to have originated from this Barracuda Spam Firewall, nor from the same user database, so it is possible to share your Bayesian database with a co-worker.

Adding Email Addresses and Domains to Your Whitelist and Blacklist

The PREFERENCES -> Whitelist/Blacklist page lets you specify email addresses and domains from which you do or do not want to receive emails.

List Type Description

The list of email addresses or domains from which you always wish to receive messages. The only time the Barracuda Spam Firewall blocks a message from someone on your whitelist is when the message contains a virus or a disallowed attachment file extension.


The list of senders from whom you never want to receive messages. The Barracuda Spam Firewall immediately discards messages from senders on your blacklist. These messages are not tagged or quarantined and cannot be recovered. The sender does not receive a notice that the message was deleted, and neither do you. The only time a blacklisted email address is delivered is if the same email address also appears in your whitelist.

To whitelist or blacklist senders, follow these steps:

  1. Go to the PREFERENCES-->Whitelist/Blacklist page.
    A list of your existing whitelisted and blacklisted addresses appears on this page.
  2. To delete a whitelist or a blacklist entry, click the trash can icon next to the address.
  3. To add an entry, type an email address into the appropriate field, and click the corresponding Add button.

Tips on specifying addresses

When adding addresses to your whitelist and blacklist, note the following tips:

Changing the Language of the Quarantine Interface

You can change the language of your quarantine interface by selecting a language from the drop-down menu in the upper right corner of the QUARANTINE INBOX and PREFERENCES tabs. Supported languages include Chinese, Japanese, Spanish, French, and others.

The language you select is only applied to your individual quarantine interface. No other user’s interface is affected.

Using Microsoft Outlook to Classify Messages

Instead of using your quarantine inbox to classify your email messages, you can download a client plugin that lets you classify messages from your Microsoft Outlook application.

Your Barracuda Spam Firwall administrator may chose not to make this plug-in available. If this is the case, you need to use your quarantine inbox to classify your messages.

Downloading the Client Plug-in

To download the client plug-in that is needed to classify messages from Microsoft Outlook, click on this link: Barracuda Networks Outlook Plug-in.

Using the Microsoft Outlook Plug-in

After downloading and installing the plug-in, you can begin classifying messages using these buttons in your Microsoft Outlook client: Outlook buttons
The first (green) button marks messages as not spam and the second (red) button marks messages as spam.

The Microsoft Outlook Plug-in is configured to automatically:

You can change the default behavior of the Outlook plug-in by going to the Tools menu in your Outlook client and selecting Options | Spam Firewall tab.