Generally speaking, because spamdyke does not run as a daemon, any kind 
of caching is very difficult.  The cache would have to be disk-based, 
which can be tricky when the server is very busy and multiple instances 
of spamdyke are attempting to update the disk.  If the server isn't very 
busy, having a cache won't matter much.

For the two things you mentioned, DNS RBL and rDNS lookups, try 
installing a caching DNS server on the mail server.  You can configure 
it (or use iptables) to only allow queries from the local machine.  I 
think you'll be surprised how much it helps.

-- Sam Clippinger

Paulo Henrique wrote:
> Sam, I was wondering if it would be possible to implement a system of
> cache in spamdyke, I believe that improving the speed in RBL test and
> rDNS.
> A spammer usually tries to send messages to more than one account in
> the same domain, with the system cache, as soon as the first attempt
> was denied the ip address of origin would be stored in a file or
> directory and future attempts would be consulted in the cache, if the
> address is found in the cache the other tests should not be run, if
> not found the tests continue the normal procedure.
> 
> I am thinking in a way to do this using bash script + iptables, but I
> think this would be a point to the spamdyke.
> 
> What do you think?
> 
> 
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