hi i'm using spamassain and exim as mail server but whe receive a lot of spam.
Each email address can be blocked on a file of the server but everytime the server must be stopped and started again the exim.
i do this
Check out Chirpy's Mailscanner installation notes at www.configserver.com. Gives some nice tips on using Exim, SpamAssassin and RBLs.
Be careful with RBLs. While they are one important source of information, I don't know that they're worth that much these days. Problem is they tend to leave servers blocked long after the spammer is banned and gone.
What I'd love to see is an RBL that blocks servers for 1-3 days (selectable depending on which version of the list you subscribe to) which auto-unblocks them after that long. Another spam occurrence would re-block for a longer period, etc. (some of the lists may implement this, I'm too lazy to check right now)