What are Realtime Block Lists (RBL) and how do they work?
RBLs are lists maintained by subscription services that identify known spammers from their activity on the Internet. The use of RBLs allows UGAMail to reject connections from these spammers. RBLs are typically updated several times each day. If a server has been listed as a likely spam host by an RBL that UGAMail uses, the email will be refused immediately. The RBLs selected to protect UGAMail were chosen for their conservative approach and responsiveness to problems. In the unlikely event that an email server is incorrectly identified as a spammer by an RBL it is removed from the RBL expeditiously.
