I think this question is about outgoing backscatter.  Is there a way
to deny/drop all incoming backscatter?  I guess the questions are:

1. Do MTAs consistently indicate in the headers that this is a bounce

2. does spamdyke have a rule to decide based on this?

Often a random user in my company will get upwards of 2000 mailer
daemon messages in one day.

I understand that this would mean 2 things, one is that I will lose
out on real bounces.  The other (if I deny it) is that I am possibly
just pushing the backscatter problem upstream and making it worse for
somebody else.

I don't mind having to change the spamdyke source.

Bruce - you could completely disable bounces from qmail (another
sledgehammer approach).

- Venkat

-----Original Message-----
From: Sam Clippinger <[EMAIL PROTECTED]>
Sent: Friday, April 18, 2008 15:51:38
Subject: Re: [spamdyke-users] Backscatter Spam Question

You're not alone in wanting this feature -- recipient validation is at
the top of my TODO list for spamdyke's version-after-next.  I'm trying
my best to get the next version (4.0.0) tested and documented so I can
release it, hopefully this month.  Once that's done, I'll be tackling
recipient validation.  Checking an LDAP directory is probably not going
to be possible in my first attempt, however.

-- Sam Clippinger

Bruce Schreiber wrote:
> I am receiving complaints about backscatter spam from my mail service.
> I would like to add a filter to block mail addressed to users that are
> not in my LDAP directory and drop them before Qmail starts its
> process.  I do not seem to see any filters in the configuration that
> fit what I want.
>
> Does anyone have any suggestions?
>
> Thank you,
>
> Bruce
>
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