Hello, 

Mark Rigby-Jones writes: 

> Briefly, we were having an issue with a spam attack from (presumably)  
> a zombie network, but to add to the fun the vast majority of the spam  
> connections were sitting doing nothing until exim timed them out  
> while waiting for a command. Even after reducing  
> smtp_receive_timeout, this was filling up the connection pool and  
> stopping a lot of legitimate email coming in.

With the spam zombies being mostly dynamic, I hardly even notice them.  
DynaStop whacks them off earily in the the helo section.   But I have seen 
an increase in my logs of their attempts. 

 --- 

DynaStop: Stopping spam one dynamic IP address at a time.
http://tanaya.net/DynaStop/

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