Milter-greylist

manu@... wrote:
> Raul Dias <raul@...> wrote:
> 
>> Even if MG caches the data it shouldnt need to, you should be running a
>> local DNS cache system.  This will offload unecessary traffic to the
>> RBLs servers.
> 
> Even if you don't have a local DNS on the machine, redundant requests
> load your site's DNS, not the RBL one.
> 

True.. and I do have a caching nameserver on the same host.

I was mostly thinking of it from a local load standpoint. Trying to structure my
ACLs to be as efficient as possible.


That said, nobody answered my second question:

> Also, on the side of efficiency, if a message gets greylisted, whitelisted, etc,
>  by a rule early in the file before reaching the dnsrbl, will there be a DNS
> query, or will it be skipped?

i.e.: is it worth trying to put a few static rules ahead of the RBL query to try
to reduce the load, or is that pointless?