On Tue, Feb 10, 2009 at 06:55:11PM +0000, Jo?o Miguel Neves wrote:
> Victor Duchovni escreveu:
>> On Tue, Feb 10, 2009 at 04:43:15PM +0000, Jo?o Miguel Neves wrote:
>>
>>
>>>>> What I'm trying is dealing with the spam sent for a single address. My
>>>>>
>> You still have not understood what REDIRECT does. Please see the
>> access(5) documentation.
>>
>> http://www.postfix.org/access.5.html
>
> Unless you're claiming that REDIRECT will redirect different messages that
> look like the redirected one, you're the one that didn't understand when I
> said that I'm trying to deal with different spam messages sent to a single
> email address.
When a single message with multiple recipients hits a spam-trap, REDIRECT
it to just the spam-trap.
When multiple messages are sent by a single IP address, and one of that
hits a spam-trap, you can consult a policy service that adds a header
that tags the mail as coming from a suspect source. Such mail can be
quarantined and released after a time delay, with potentially more
up-to-date rules able to filter the mail at that point.
Implementation of a quarantine is outside the scope of the Postfix
system, you can put mail in the hold queue, or build an LMTP server
that feeds the quarantine, and use "FILTER" to route mail to the
quarantine. The quantine server can feed Bayesian filters when
mail comes in, and hope that the filters are well trained when
the mail is finally released to the recipients.
--
Viktor.
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