Spam firewall, what they say
It is able to determine the sender and the IP address of the e mail for instance. Since there are certain senders and e mail servers that are known sources of spam e mail, this action of Barracuda firewall considerably reduces the risk of such e mail getting through. The Barracuda firewall also examines the message headers of each e mail in order to uncover any signs of spam. Even the most devious e mail servers won't be able to pull a fast one on the Barracuda firewall, as it can detect any changes in the message headers of e mails. The Barracuda firewall is not susceptible to such deceptive tactics, since most modifications to the e mail headers are generally considered as a spamming attempt.