[exim] Block IP's based on honeypot addr's?

I have some email addr's that are not used that are doing a nice job collecting
tons and tons of spam.

I would like to have exim firewall off an IP if these addresses are ever
hit. By my count, it would eliminate something like 300,000 spam/day on my
server.

I could just tail the mainlog, but was hoping for something built into
exim directly.

Anyway, just a thought...

Thanks.