[CLUE-Tech] Qmail doublebounce

[Kevin Fenzi]

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>>>>> "George" == George Finney <diggablelinux at yahoo.com> writes:

George> I know Sean covered this in his qmail session, but I cannot
George> remember the control file to use to solve my problem.

George> I've got a qmail server using vpopmail for virtual domain
George> support.  The users in the virtual domains get spammed, and
George> move to other addresses, etc, but they remain on the spam
George> lists.  So when an address gets spammed that doesn't have a
George> user connected to it, qmail bounces the message back to the
George> sender.  Spammers know this and don't accept bounces.  So
George> qmail gets a double bounce message, but instead of going to a
George> non-existent user, it comes to my inbox, the admin...

George> I remember there being a control file, like doublebouncehost
George> or doublebounceto, but instead of sending doublebounce
George> messages to the address specified in those files, it discards
George> the message, so no more doublebounce spam for me...Any ideas?

man qmail-control

The two control files you might be interested in are:

              control             default            used by

              doublebouncehost    me                 qmail-send
              doublebounceto      postmaster         qmail-send

So, changing doublebounceto should let you set who gets them. 
If you set it to:

# this is a comment

it will go to no where and get dropped. 
You will have to restart qmail-send when you change those files... 

The logs should show you where it's sending the messages as well.

George> George

kevin
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Date: Tue, 16 Apr 2002 10:51:24 -0600
From: Sean Reifschneider <jafo at tummy.com>
To: clue-tech at clue.denver.co.us
Subject: Re: [CLUE-Tech] Qmail doublebounce
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On Tue, Apr 16, 2002 at 09:34:46AM -0700, George Finney wrote:
>that doesn't have a user connected to it, qmail bounces the message back
>to the sender.  Spammers know this and don't accept bounces.  So qmail
>gets a double bounce message, but instead of going to a non-existent user,
>it comes to my inbox, the admin...

Try adding those recipients to the "badrcptto" control file (if you built
with the anti-spam patch which includes it).  That causes the SMTP server
to refuse the message before it hits your machine.

>I remember there being a control file, like doublebouncehost or
>doublebounceto, but instead of sending doublebounce messages to the
>address specified in those files, it discards the message, so no more
>doublebounce spam for me...Any ideas?

According to the "qmail-control" man page, you have "doublebouncehost" and
"doublebounceto", which you can find more information on in the qmail-send
man page.

Sean
-- 
 Q. What's the difference between Batman and Bill Gates?
 A. When Batman fought the Penguin, he won.
Sean Reifschneider, Inimitably Superfluous <jafo at tummy.com>
tummy.com - Linux Consulting since 1995. Qmail, KRUD, Firewalls, Python