R: Spamassassin Timeout issue.

[Alex Neuman van der Hans]

Specially since spam *usually* comes in batches from a few discrete  
sources at a time. Splitting recipients at the mta level helps even  
further through SA caching.

Sent from my iPhone

On Sep 10, 2008, at 12:56 PM, "Martin.Hepworth" <martinh at solidstatelogic.com 
 > wrote:

> A quick look at the underlying dns protocol will show u why a local  
> caching dns  server will speed up queries over even a server <1ms  
> away, and in practice the results can be dramatic for a system like  
> SA/MS that is quite dns hungry.
>
> -- 
> martin
>
> -----Original Message-----
> From: Chris Sweeney <csweeney at osubucks.org>
> Sent: Wednesday, September 10, 2008 6:45 PM
> To: MailScanner discussion <mailscanner at lists.mailscanner.info>
> Subject: RE: R: Spamassassin Timeout issue.
>
>> Personally, I don't think it is a significant difference either way.
>> If, however, you're running an older version of bind or other DNS  
>> server
>> that doesn't do random ports, and you don't have the luxury of  
>> upgrading
>> in the immediate future, using opendns as a forwarder will add a  
>> layer
>> of protection...
>>
> It's going to depend on your network path to OpenDNS also.  I  
> personally
> have never found it faster to go off network (OpenDNS) then do lookups
> myself.  Especially on a mail server since alot of your SPAM comes in
> batches the lookups to the same domain are going to much significanly
> faster in that respect.
>
> I've tried OpenDNS quite a few times and although its good and it is  
> fast
> it has never beat going local in my test enough to increase my traffic
> going out/in from the internet.
>
>
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