Who does RBL checks - MailScanner or SpamAssassin?

Dhawal Doshy dhawal at netmagicsolutions.com
Thu Jun 8 10:08:25 IST 2006

Res wrote:
> On Wed, 7 Jun 2006, Dhawal Doshy wrote:
>>> Ever tried running S.A on servers that do serious work, and want your 
>>> mail out of the queue and delivered the same week ? :)
>>> (I do run SA on the machines that can handle it though, but thats 
>>> like 2 out of many)
>> Most of us run servers that pretty much do serious work ;-).. to each 
>> his/her way. You can use RBLs at:
>> SpamAssassin: Best way to use RBLs as per my POV.. the bad part being 
>> that mails originating from ROKSO (spamhaus) are accepted and then 
>> tagged.
> I'd like to know how your customers get mail so fast, at a constant rate 
> avg of 500 messages per minute, SA can not hope to keep up, after 5 mins 
> the queue was at about 1900 *to be* processed, where MailScanner with 
> anti virus and content checking and all that stuff on it usually keeps 
> up fine anbd people get mail seconds later, SA was tunned to best 
> performance by recommendations, and otehr recommendations that it should 
> be used on high end networks (i know why) if I left that wretched load 
> of crap on, my customers would get mail a week later and some probably 
> months later and id be replaced pretty quickly :)
> But  like I said, on some of our smaller more dedicated mail servers we 
> do use it, because on those that do 50 msgs a minute SA can keep up.

<blow your own trumpet>
I do about sustained 12 mails per second for a couple of hours in a day 
which equals (12*60*60*2 = 86400) and about the twice that throughout 
the day totaling about 225000 mails per day between 2 servers.. no bad i 
guess. Both servers are fully loaded MailScanner/Postfix/SA/DCC/Pyzor 
and add BAYES/MailWatch (on a separate server), 3 antivirus engines and 
SARE to the list. This is not counting mails rejected at the RBL level.

Average mail delivery time is 10-15 seconds to the delivery servers. And 
i haven't done any advanced tuning (save using TMPFS) on these servers. 
Of course it helps to have Dual Processors and 3 GB RAM with SCSI Disks 
(Dell PE1850).
</blow your own trumpet>

I understand people on this list process a lot more mails with a similar 

- dhawal

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