Re: SpamAssassian with FreeBSD and Big Mail Server
From: Christian Damm (christian.damm_at_diewebmaster.at)
Date: 02/25/05
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Date: Fri, 25 Feb 2005 11:24:55 +0100 To: Suporte Matik <asstec@matik.com.br>
Suporte Matik schrieb:
> On Thursday 24 February 2005 06:32, Christian Damm wrote:
>
>>thomas@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.
my false positive rate is around 0.01% - and we are talking >50k
userbases here. if you need some out-of-the-box solution SA is fine -
thats not what dspam really was made for. in the long run dspam is much
more reliable/scaleable.
but agreed, dspam requires some real tweaking and RTFM...
http://www.nuclearelephant.com/projects/dspam/howtotest.txt
> 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
mysql is really a must when it comes to dspam - the pgsql support is ok,
but bdb sucks! i dont blame dspam for that, bdb is the pig here.
agreed, running dspam as your only weapon against spam can really load
your boxes in medium sized environments - but there are many
possibilities to tune dspam for high load.
> 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.
i give you all the numbers you want - just ask. ;-)
>
> 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.
1.) procmail is slow (even maildrop is, altough its 3 times faster)
2.) you have to maintain your SA ruleset
3.) SA is a perl bloat (anyway - i like it) - thats also one of the
reasons i want to drop amavisd-new off my boxes when i find a good
alternative...
>
>
> 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@freebsd.org mailing list
>>>>>http://lists.freebsd.org/mailman/listinfo/freebsd-isp
>>>>>To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org"
>>>>
>>>>--
>>>>
>>>>mfg.
>>>>
>>>>christian damm
>>>>technische leitung
>>>>phone: dw 42
>>>>email: christian.damm@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
>>>>homepage: www.diewebmaster.at, public email: office@diewebmaster.at
>>>>_______________________________________________
>>>>freebsd-isp@freebsd.org mailing list
>>>>http://lists.freebsd.org/mailman/listinfo/freebsd-isp
>>>>To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org"
>>>
>>>!DSPAM:421d64a4175283000910921!
>
>
>
> ------------------------------------------------------------------------
>
> !DSPAM:421db801170271219614910!
-- mfg. christian damm technische leitung phone: dw 42 email: christian.damm@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 homepage: www.diewebmaster.at, public email: office@diewebmaster.at _______________________________________________ freebsd-isp@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-isp To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org"
- Previous message: Christian Damm: "Re: SpamAssassian with FreeBSD and Big Mail Server"
- In reply to: Suporte Matik: "Re: SpamAssassian with FreeBSD and Big Mail Server"
- Next in thread: Randy Adamczyk: "Re: SpamAssassian with FreeBSD and Big Mail Server"
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