User`s guide

Configuring the Spam Settings

■ Barracuda Spam Firewall User’s Guide

Configuring the Spam Settings

The BASIC-->Spam Scoring page lets you modify the global scoring values and specify the subject tag

for spam messages. Click Save Changes after making any changes to this page.

Configuring the Global Spam Scoring Limits

Once a message passes through the block/accept filters, it is then scored 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 tags, quarantines, blocks or allows the message.

The following table describes the settings associated with spam scoring. A setting of 10 for any setting

disables that option.

Note: On the Barracuda Spam Firewall 400 and 600 you can set the spam scoring values on a per-

domain basis from the DOMAINS tab. For more information, refer to Managing and Configuring

Domains on page 54.

Specifying the Subject Text and Priority for Tagged Messages

The BASIC-->Spam Scoring page lets you enter the text that appears at the beginning of the subject line

of tagged messages. The default text is “[BULK]”.

The system tags a message when:

■ The message’s spam score is over the tag threshold (but below the quarantine threshold).

■ The block/accept filters identify a message that should be tagged. For information on setting up the

block/accept filters to tag messages, refer to Using the Block/Accept Filters on page 37.

If Set Low Priority is set to Yes, any messages that are tagged are marked as low priority.

By default, the Barracuda Spam Firewall sends a notification to senders when their emails are tagged as

spam and not delivered to the recipient. To turn off automatic notification, set Send Bounce to No.

Note: You can create rules in many mail clients to place tagged messages in a separate mail folder. For

example, when your users receive spam messages with a subject tag of “[BULK]”, you can configure

their mail clients to deliver these messages to a folder called Possible Spam.

Setting Description

Tag score Messages with a score above this threshold, but below the quarantine threshold, are

delivered to the sender with the word [BULK] added to the subject line.

You can change the default text added to the subject line by entering new text in the

Spam Tag Configuration section (discussed at the bottom of this page).

Any message with a score below the tag threshold 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 the quarantine mailbox you specify. For information on specifying the

quarantine mailbox, refer to Specifying the Global Quarantine Settings on page 30.

The default setting is 10 (quarantine disabled).

To enable quarantine, this setting must have a value lower than the block threshold.

Block score Messages with a score above this threshold are not delivered to the recipient and the

Barracuda Spam Firewall sends a non-delivery receipt (NDR/bounce message) to the

sender. The default value is 7.