On 07/12/2011 09:59 PM, Bob Miller wrote:
To the whole list this time...
Hi Hugo,
Thank you for your reply
So, having read a great deal of this mailing list's archives, I did
not
find any solutions suggested. But I have come to realize that there
is
more than one genius on this list. Hopefully one of you has run
across
this already and would share your approach to this problem...
Hello Bob,
What are you going to do with the messages that are flagged as spam?
Reject them at smtp talk time or just tag them (subject/message
headers)
and let the user decide what to do with them?
The way I do it on my current (non-ldap) servers is to tag anything with
a score between 5 and 10 and let it pass, and immediately reject
anything with score over 10, with no per-user config. For a global
config, this has been working very well for me for several years, so I
would like to model this system based on that. But as the range of
users on my systems increase, so does the need for some people to be
able to adjust their score threshold up or down. If I need to rethink
the way I am doing things now in order to accomplish the goal, I am okay
with that...
Have you considered DSPAM instead of spamassassin? I don't know
spamassassin that well, but i'm aware that DSPAM is highly configurable,
supports per user settings, including separate spam dictionaries,
quarantine, etc ... and it's highly accurate if configured/trained right
and it's FAST. I would also advise you to setup your content scanning
(spamc, dspam, etc) at the delivery time, and not at message acceptance.
For that particular stage i would advise other tools such as early
talker disconnection, greylisting and helo checking, or even rbls if
that rocks your boat.
Content analysis is usually a costly operation and can lead to false
timouts, when accepting mail, making the remote server retry the
delivery and causing duplicate message delivery. That said, IMHO i would
leave simscan to work with clamav only and handle spam later in the process.
Although it's a bit out date, you could take some ideas from a web page
where i explain a possible setup.
http://hmonteiro.net/howtos/qmail-ldap/start
That link is for an empty page, but it will show you 4 sub pages on the
left menu regarding several aspects i talk about above. By no means
that's the only way to setup things, nor it's the best in every case,
but i'm sure it will give you a couple of ideas to work on.
Regards,
Hugo Monteiro.
--
fct.unl.pt:~# cat .signature
Hugo Monteiro
Email : [email protected]
Telefone : +351 212948300 Ext.15307
Web : http://hmonteiro.net
Divisão de Informática
Faculdade de Ciências e Tecnologia da
Universidade Nova de Lisboa
Quinta da Torre 2829-516 Caparica Portugal
Telefone: +351 212948596 Fax: +351 212948548
www.fct.unl.pt [email protected]
fct.unl.pt:~# _
