[CentOS] postfix and spam, I am impressed

Tom Bishop bishoptf at gmail.com
Tue Mar 13 14:28:08 EDT 2012


Nataraj

 I need something for a very small shop and have been looking...been
reading the comments.  Is vpostmaster easy to setup and maintain, I'm
looking for something lightweight and works for spam, I support them after
hours and looking for something that just works....

On Tue, Mar 13, 2012 at 1:22 PM, Nataraj <incoming-centos at rjl.com> wrote:

> On 03/13/2012 11:05 AM, Les Mikesell wrote:
> > On Tue, Mar 13, 2012 at 12:00 PM, Nataraj <incoming-centos at rjl.com>
> wrote:
> >> Ok, so it wouldn't work to just use the oldest received, but a smarter
> >> inspection could check to see weather it actually passed through a
> >> server owned by the claimed domain.  The reality is that what is need is
> >> to input this into a scoring system weighted with other spam evaluation
> >> mechanisms, something like spamassassin.  The downside of spamassasin is
> >> that it is costly to run and must be run after the message is accepted
> >> by the smtp server.
> > MimeDefang runs it as part of its own milter process so you don't
> > start a new perl for each message  (and multiplexed so there is not
> > necessarily an instance for every mailer process), and at a point
> > where you can do an smtp reject based on the content.
> >
> >> There already exist so many different spam control methods, many of them
> >> can run at the smtp level and reject mail prior to accepting.  I get
> >> pretty decent rejection from greylisting.
> > MimeDefang doesn't do greylisting although the hooks are there if you
> > wanted to do it yourself.  But, you can run multiple milters and
> > milter-greylist works OK.
> >
> >> I would look at the milter that Les mentioned.  I haven't had a a chance
> >> yet.
> > I set up the package from rpmforge a long time ago along with their
> > clamav.  I see they are both in epel now - not sure what you would
> > have to do to make them work with postfix, though.  I've seen them
> > mentioned together on the mimedefang mail list, so someone must be
> > doing it.
> >
> I run clamav and the greylisting implementation and the spamassasin
> interface that's included with vpostmaster. It's not perfect, but it's
> all quite nicely coded in python and easy to tweak.  The GUI allows
> changing spamassasin, greylisting, clamav parameters on a per user
> basis.  Users can also login to the gui and manage their own spam
> control.  The database also has designed in, the ability to store per
> user configuration for other modules that you might add yourself.  I
> will look at MimeDefang.
>
> Nataraj
>
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