On 4/27/12 2:05 PM, Eric Shubert wrote:

> On 04/27/2012 10:54 AM, Gary Gendel wrote:
>
>> Since spamdyke runs on an unmodified qmail setup, it seems that a
>> good addition would early detection of non-existing users.  This
>> will fix the backscatter problem that is inherent with qmail by
>> rejecting email before queuing rather than bouncing them.
>>
>> http://en.wikipedia.org/wiki/Backscatter_%28email%29
>>
>> Gary
>
> The todo.txt file contains this item: Finish testing the recipient
> validation code and add it to the codebase.
>
> That seems to indicate that this feature is close to being a
> reality.
>
> In the meantime, you can consider using chkuser
> (http://www.interazioni.it/opensource/chkuser/).

  I have an experimental version of spamdyke that will do this, using
an inverse blacklist mechanism.  I wanted to be able to blacklist
everything except x, without whitelisting x, for a list of x.

  Essentially, one can say recipient-blacklist-file = !filename and
anything that fails to match at least one line in the file gets
blacklisted.  You can list your users in the file (if there are not
too many of them).

  If you want to try it, email me and I'll send you the patch against
the standard source.

Cheers,

        John

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