Being blocked by websites using PHPrbl, means something is terribly amiss on the computer (or network) you are trying to view the website from. Chances are, your computer (or network) has been infected by a worm and/or is part of a botnet sending out SPAM.
How do I get unlisted?
Find out where and how you have been blocked. PHPrbl notifies you which RBL lists your IP address is listed in. By default, PHPrbl makes use of “sbl-xbl.spamhaus.org” and “dnsbl.ahbl.org” to check wether to allow or deny an IP address.
The lookup form for the Spamhaus database is located at http://www.spamhaus.org/lookup.lasso. You will be presented with ways to remove your IP address from the database if it is listed.
The lookup form for the AHBL database is located at http://www.ahbl.org/lktool. Just like Spamhaus, you will be presented with ways to remove your IP address from the database if your IP address is listed.
Other RBL services
Sorry, I can’t really help you there, as there are quite a lot of them around. Try using Google to find the information you need to unlist yourself.
Okay, I unlisted myself, I am done now right?
Sorry, but no. You still need to take care of the virus/worm/botnet running on your computer. Try getting rid of them using an antivirus programme like Norton Internet Security or AVG Anti-Virus & Anti-Spyware. Both products can be downloaded right after buying them, so you can get at it right away.