I just updated the version to 3.10, do you have any information about configuring the spam filtering feature. What URL should I put on the RBL ( Real Time Black List SERVER) Server URL?

Here are the basic settings you should make regarding the Spam filter:

- Set RBL server = relays.ordb.org
- Enable Check for NULL sender
- Enable Message Filtering
- Filter these attachment extensions: scr, bat, exe, pif, vbs, com, cmd, dll