Server Level Anti-spam Options (Blacklists)
You can separate into two categories:
- A trusted realtime blacklist is the one that is updated frequently, and is more likely to be accurate. You may also identify a blacklist as trusted because you find that it produces the least number of false positives. If a message matches one of these blacklists, it is automatically deleted.
- A standard realtime blacklist is a blacklist of which you are uncertain about its accuracy. If a message matches one of these lists, an X-Header is inserted into the message, indicating which blacklist it matched.
How Blacklists Work
Understanding Realtime Blacklists
Server Level Realtime Blacklists