SpamAssassian with FreeBSD and Big Mail Server

Thu Feb 24 03:16:42 PST 2005

On Thursday 24 February 2005 06:32, Christian Damm wrote:
> thomas at hkeasyhost.com schrieb:
> > I would like to try dspam as well as I am using spamassassin, but dspam
> > are leak of docs on postfix supporting, and no one got experience with
>
> i can encourage you to do so - you wont regret it: the statistical spam
> filtering methods in dspam are miles ahead spamassassin`s (spamassassin
> on the other hand is an antispam framework where so many things can be
> done (rbl`s, razor, dcc, spf etc.) - i do things like rbl checking
> (wirespeed) on the smtp level with postfix so i dont mind.
> the postfix integration is dead-easy, really. the dspam docs could be
> better but the dspam mailinglist is quite helpful if you got questions.
> also consider using one of the many postfix/dspam/etc. howto`s out there:
>

I am not so sure here
I tried several different setups of Dspam and on small test servers 100 users 
or so it actually worked but even so the false-positive rate was very high, 
actually too high.
But another test server with only 2000 user dspam is lost already and it 
didn't matter which store method I tried out, even a MySQL for it only. It 
runs a day or two but soon a spam wave comes in message delivery time grows 
up, memory goes up, the queue fills the disks and swap is eaten until the 
server goes down on his knees. When I tried to get some numbers nobody 
answered clearly and I only hear ohh I have lots of users but I never saw 
something real.

spamassassin on the other side with good rules maintanance is hitting fine, I 
get almost no false-positives and almost all spam is correctly identifies 
which we drop into a spam folder with procmail. That is cool, no memory 
excess and absolutly stable and reliable.

Hans

> http://devnull.com/kyler/dspam.20040609.html
>
> > dspam+Spamassassin together, so...
>
> the latest amavisd-new versions got dspam support - anyway its a little
> bit "hacky" at the moment i.m.h.o, so i wouldnt really use it on
> production hosts (some might disagree in small mta environments).
>
> >>Vahric MUHTARYAN schrieb:
> >>>Hi Everybody ,
> >>>
> >>>            Really I don't know can I say a big mail server which have
> >>>30,000 mailbox on it 1200+ simultaneously connections
> >>>(pop,smtp,webmail).
> >>>Ýncoming smtp connections are between 200-400 . We want to run spam
> >>>software
> >>>on it but machine can't handle it for this reason we seperated machine
> >>>freebsd+exim+SpamAssassian but on 400 connection machine goes down
> >>>average
> >>>is very high , cpu usage really too high .
> >>>
> >>>            I want to learn Anybody Who have closer or bigger system and
> >>>using SpamAssassian ?!
> >>>Really this 400 connection simultaneously can be limit for spam software
> >>>?!
> >>>I mean Anybody can handle more ?!
> >>>I have to design distributed environment ?!
> >>>
> >>>My Hardware is (for spam)
> >>>            2 X PIII 1G +  1 GB RAM + 2 DISK RAID 0 SCSI 10000 RPM
> >>
> >>i use spamassassin only on small-/medium-sized MTA installations (its a
> >>memory/cpu hog i.m.h.o. but i like it) - on all my "bigger" systems i
> >>really prefer dspam (coded in straight C and fast as hell). it is used
> >>in some environments with 350,000 email users and scales really well (if
> >>you have the iron and experience to build/maintain such a
> >> system/cluster).
> >>
> >>http://www.nuclearelephant.com/projects/dspam/
> >>
> >>>Thanks
> >>>Vahric
> >>>
> >>>_______________________________________________
> >>>freebsd-isp at freebsd.org mailing list
> >>>http://lists.freebsd.org/mailman/listinfo/freebsd-isp
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> >>
> >>--
> >>
> >>mfg.
> >>
> >>christian damm
> >>technische leitung
> >>phone: dw 42
> >>email: christian.damm at diewebmaster.at
> >>icq at work: 124464652
> >>
> >>die webmaster - flötzerweg 156 - 4030 linz - austria
> >>phone: +43-732-381242, fax: +43-732-381242-22, isdn (leonardo):
> >>+43-732-381242-33
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> >
> > !DSPAM:421d64a4175283000910921!

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