On Fri, Jun 14, 2013 at 12:37:11PM +0200, Petar Bogdanovic wrote:
> On Fri, Jun 14, 2013 at 12:08:00PM +0200, Bastian Blank wrote:
> > On Fri, Jun 14, 2013 at 08:50:42AM +0200, Manuel Badzong wrote:
> > > I would like to introduce mail gopher, a new all-in-one, MIT-licensed
> > > mail filter.
> > How does it relate to Postfix?
> It's a milter that some people on this list might find useful.

So it only supports what the milter server can do.

> > > Mopher can:
> > >   + tarpit hosts
> > Bad idea in userspace.
> So kernel space then?

A milter can't do that anyway, the communication is controlled by the
other side of the milter connection. You can wait a long time for each
response, but this does not get you anything.

> > >   + count failed/successful delivery attempts by hosts
> > What do you want to do with this information?
> Whitelisting based on the amount of successfully delivered mails is
> probably the best example.

You need whitelisting for high volume senders, because they split stuff
over larger address ranges. Those also produce a high rejection rate
(not: ratio).

> > >   + PSL (by Mozilla, see http://publicsuffix.org/)
> > What is the use for this?
> It helps with domain-based greylisting.  There are no simple rules when
> figuring out the registered part of a fqdn.

So you do greylisting based on DNS reverse lookups?

Bastian

-- 
Extreme feminine beauty is always disturbing.
                -- Spock, "The Cloud Minders", stardate 5818.4

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