CircleID

Umm.. spam isn't levelling off. What you're seeing is more probably the start of a huge spike :)

When you consider that the amount of inbound spam that attempts to be delivered is several orders of magnitude more than the amount of incoming legitimate email ... it is more like "spam volume tends to 100%".

One of my colleagues threw this graph together some months back, from a minute's worth of logs on just one of our mailserver clusters -

http://www.nixcartel.org/~devdas/minute.png