OT--spam problem

[Ant]

Ok, I can see using DNSBL's but how does that help with the "new" spam I
get?

Many BLs use spamtraps, which are email addresses that have never been
used or made known. These are hidden on web pages from normal view,
but visible to spam-bots that harvest them. When a spam-run starts on
a previously clean IP address, any mail hitting spamtraps will cause
that IP to be listed automatically and quickly. It's a good bet that
by the time you collect your mail the IP is already blacklisted.