Why is my IP listed on the Barracuda Reputation System?

Through Barracuda Central, the Barracuda Reputation System manages a real-time database of IP addresses with a "good" and "poor" reputation for sending valid emails. From time to time, a valid IP address may be marked as "poor," which may be caused by one of the following reasons:

  • Your email server contains a virus and has been sending out spam.
  • Your email server may be improperly configured.
  • Your PC may be infected with a virus or botnet software program.
  • Someone in your organization may have an infected PC with a virus or botnet program.
  • You may be using a dynamic IP address which was previously used by a known spammer.
  • Your marketing department may be sending out bulk emails that do not comply with the CAN-SPAM Act.
  • You may have an insecure wireless network which is allowing unknown users to use your network to send spam.
  • In some rare cases, your recipient's Barracuda Spam Firewall may be improperly configured.

Barracuda Networks strives to keep email free of spam. To manage the billions of emails processed per day, the Barracuda Reputation System uses automated algorithms for determining its results -- very similar to the anti-fraud mechanisms used for credit cards.


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