Barracuda Central provides an online block list of IP addresses and domains it believes to be a threat to internet users. Their list can be used to filter email addresses that have been reported to send spam emails and those that may contain viruses and other threats such as viruses and malware. Barracuda classifies IP addresses and email addresses based on spam received, but it is sometimes possible that an address is classified in error and it is possible to request removal from the list.
