Too much spam

[francis picabia]

On Wed, Sep 21, 2011 at 12:57 AM, Jari Fredriksson <jarif at iki.fi> wrote:
> 21.9.2011 6:09, Julio Cesar Covolato kirjoitti:
>> Hi.
>>
>> How can I fine tune spamassassin to block more spam?
>>
>> I instaled iRedMail-0.6.1 in an ubuntu 10.04, amavisd-new-2.6.5
>> (20110407), dell Xeon 4 core whith sas disks
>>
>> The sistem is well working , very fast, but too much spam!
>> Today i installed pyzor and razor and no mutch diference in amount of
>> spam droped in clients mailbox!!!
>>
>> Working whith +-80.000 messages recived and +-30.000 messages sent by day.
>>
>> Any hints?
>>
>
> Post to Spamassassin Users list and ask there.
>
> Have a local caching nameserver, allow network tests (should be
> default), and try somehow train your Bayes. I understand that Bayes may
> be hard to manage in a multiuser system, but Bayes is important.
>
> I use SpamAssassin for my personal mail only, and I have 0.01% of Spam
> in my Inbox.

I suggest compiling a 2.8 version of postfix, and enable postscreen.

Postscreen does a good job of disconnecting bogus mailers.
Very cheap on CPU cycles compared to other options such
as spamassassin.

If you like, also enable the greylisting which is said to be
delivered with iredmail.