Barracuda 是一間郵件及網路安全設備的供應商，Antispam 是她們的專長。除了自己的 Filtering 技術外，也有用上自家的 RBL 。上年八月左右她們將這個 RBL 公開給其他人使用，大家只需要到
http://www.barracudacentral.org/rbl
登記後，你的 email server 便可使用。(但我試過就算不登記也可使用 :-D)
跟著在 spamassassin rules 加上:
header RCVD_IN_BRBL eval:check_rbl('brbl-lastexternal', 'bb.barracudacentral.org.')
describe RCVD_IN_BRBL Received via a relay in Barracuda BRBL
tflags RCVD_IN_BRBL net
score RCVD_IN_BRBL 2.5
Comment by 
Here are some very easy ways to ensure the security of your domain.
1. Set your whois email contacts to an administrative email account. Set a very long and complex password on the account and have all email forwarded to your daily use account. Since you do not log into the account and it has a very long and obfuscated password it makes it much more difficult to break into. Also set very random security questions, as sometimes your security questions can be very simple to break. Since the email address listed in the whois database is publicly available it is the prime target for anyone attempting to steal a domain, this practice adds a layer of security, much like root priveledges in a linux environment.
2. Get privacy on your domain. Privacy masks your whois contact information. The less information someone has on your domain, the more difficult it becomes for them to gain control of it. Also be aware that there are services that keep a history of whois information, so this is not a fullproof method of privacy since the information is probably still out there.
3. Keep your registrar(GoDaddy, Moniker, Etc.) email address different than your whois email address. This makes it more difficult for someone to gain direct access to your domains since your account email will not be publicly available.
4. If you are really concerned, pay for a service like Protected Registration at GoDaddy. This service locks down a domain irrevocably. In fact, it makes it almost impossible to transfer even if it’s you that wants do the transferring.
5. Keep alerting on. Most registrars have account options that will send you an email if any registrant information is changed or a domain is unlocked. Make sure it’s turned ON!
6. Call the experts! I have all my domains at GoDaddy and I use Google Apps on over 40 domains. If I need to know something about my account I call the free support and ask them.
