User`s guide

Chapter 4 Using the Barracuda Spam Firewall to Filter Your Emails ■ 69
Changing your User Preferences
Enabling and Disabling Spam Scanning of your Email
If you do not want the Barracuda Spam Firewall scanning your emails for spam content, you can disable
spam filtering from the PREFERENCES-->Spam Settings page. From this page you can also change the
default spam scoring levels that determine when your emails are tagged, quarantined or blocked.
When the Barracuda Spam Firewall receives an email for you, it scores the message for its spam
probability. This score ranges from 0 (definitely not spam) to 10 or higher (definitely spam). Based on
this score, the Barracuda Spam Firewall either allows, quarantines, or blocks the message.
A setting of 10 for any setting disables that option.
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.
Setting Description
Spam Filter Enable/Disable
Enable Spam
Filtering
Select Yes for the Barracuda Spam Firewall to scan your emails for spam.
Select No to have all your messages delivered to you without being scanned
for spam.
Spam Scoring
Use System
Defaults
Select Yes to use the default scoring levels. To configure the scoring levels
yourself, select No and make the desired changes in the Spam Scoring Levels
section described below.
Spam Scoring Levels
Tag score Messages with a score above this threshold, but below the quarantine
threshold, are delivered to you with the word [BULK] added to the subject line.
Any message with a score below this setting is automatically allowed. The
default value is 3.5.
Quarantine score Messages with a score above this threshold, but below the block threshold, are
forwarded to your quarantine mailbox.
The default setting is 10 (quarantine disabled).
To enable the quarantine feature, this setting must have a value lower than the
block threshold.
Block score Messages with a score above this threshold are not delivered to your inbox.
Depending on how the system is configured, the Barracuda Spam Firewall may
notify you and the sender that a blocked message could not be delivered.
The default value is 9.
List Type Description
Whitelist A list of e-mail addresses or domains from which you always wish to receive
messages. The only time the Barracuda Spam Firewall filters a message from
someone on your whitelist is when the message contains a virus or a disallowed
attachment file extension.
Blacklist A 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.