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Why is the Barracuda Spam & Virus Firewall scoring emails too high in Jan 2012?

  • Type: Knowledgebase
  • Date changed: one year ago
Solution #00005843

On Jan 1, 2012, Barracuda Networks discovered an unusually high instance of a low frequency spam rule being triggered. As a result  emails processed by the Email Security Gateway were scored higher than usual. The root cause of this was traced to a spam scoring rule from 2009. On of the attributes of the rule was to stop spam emails that are sent out with a date in the future. A score of +3.38 was added to email with dates after Jan 1, 2012.

The rule was adjusted at 2012-01-01 05:52:24 -0600.

The high score as a result of this rule in itself does not mark the email as spam. Other characteristics of the email are checked to determine the final score. The Email Security Gateway can be configured to either block, quarantine or tag emails based on score. The threshold can be specified in the Spam Scoring Limits section on BASIC -> Spam Checking page. Customers who had their Email Security Gateway configured to block emails with score 4.0 or lower might notice some legitimate emails being blocked.

Customers with current Energize Updates Subscription will automatically receive the update. No action is required.

In some high security environments, the Email Security Gateway might be blocked from directly downloading definitions from Barracuda Central. In such cases, customers should ensure that the proxy server settings on BASIC -> IP Configuration are correct, enabling the Email Security Gateway to contact Barracuda Central and receive all required definitions.

Customers with expired Energize Updates subscriptions will not receive any definitions. They should contact Barracuda Renewals department.