User`s guide

Using the Block/Accept Filters
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■ Barracuda Spam Firewall User’s Guide
Note: All messages, including those from whitelisted senders, go through attachment filtering. This
means that if a sender on your whitelist sends a message containing an unallowed attachment type, that
message is either blocked or quarantined (depending on your settings).
Filtering by Subject Line
The BLOCK/ACCEPT-->Subject Filtering page lets you filter messages based on the contents of a
message’s subject line.
The following table describes the parameters on this page. Click Save Changes after making changes.
Note the following about content filtering:
■ You can enter multiple lines for each filter, but each line should contain one regular expression or
word. Each line is applied independently.
■ HTML comments and tags imbedded between characters in the HTML source are filtered out so
content filtering applies to the actual words as they appear when viewed in a web browser.
Notify sender of
Banned File
Interception
Select Yes to notify senders when one of their emails has been blocked
because it contained a banned file extension.
Attachment Quarantine
Quarantined
Attachment Extensions
Add the attachment extensions (without the “.”) to quarantine. The complete
email containing the attachment is sent to the quarantine account.
Quarantine Extensions
in Archives
Select Yes for the system to scan the contents archive files (such as zip
files) for the extensions you want to quarantine. The Barracuda Spam
Firewall quarantines the entire message if it has an archive file containing
one of these extensions.
Quarantine Password
Protected Archives
Select Yes for the system to quarantine messages that contain password-
protected archive files (such as zip files).
Password-protected archives cannot be scanned for file extensions. For this
reason, you may want to block these type of archives.
Filter Description
Subject Blocking Enter the words, regular expressions, or characters that will cause a
message to be blocked if they appear in the subject line.
Subject Quarantine Enter the words, regular expressions, or characters that will cause a
message to be quarantined if they appear in the subject line.
Subject Tagging Enter the words, regular expressions, or characters that will cause a
message to be tagged if they appear in the subject line.
Subject Whitelisting Enter the words, regular expressions, or characters that will cause a
message to be whitelisted if they appear in the subject line.
Filter Description