[exim] refused: too many connections

I'm having an issue with Exim 4.63 on a Centos server. Exim will run fine
for a few days then all of a sudden start reporting that there are too many
connections.



smtp_accept_max is currently 500

queue_run_max is currently 50



When I do a netstat -anp there are only a handful of actual connections to
Exim, but a ps shows 500+ processes.



exiwhat responds saying that just about all the processes running are
accepting connections from various addresses.



I do have an av_scanner set up using F-Secure



Any thoughts on why I get a misleading message, and why its stopping me
accepting email ?



-Andy-