You probably want to check this http://slett.net/spam-filtering-for-mx/exim-bounces.html This very well explains how to limit bounces to real users. After all, there is no reason accepting a bounce if you didn't send a message.
Although I prefer doing a discard on the bounce than denying it. It may well consume more bandwidth, but you won't get listed at rfc-ignorant.org for refusing bounces. > Subject: > [exim] Filtering spam bounces > From: > Alastair Campbell <[EMAIL PROTECTED]> > Date: > Sun, 14 May 2006 22:02:05 +0100 > To: > [email protected] > > To: > [email protected] > > > Hi, > > If I'm asking the wrong question in the wrong place, please do point me > somewhere else - I'm new here. > > The problem: > I am receiving a lot of bounces from someone using my domain as the > reply to address. Not thousands a day (like 4 days last year), but > roughly 30 a day for about a month now, all to random strings of letters > @alastc.com. (e.g. [EMAIL PROTECTED]), from different IP addresses > around the world. > > The solution concept: > I would like to have a rule somewhere that says "If email subject > matches ('failure notice' | 'Undelivered' | 'Returned mail') and is not > addressed to a specific (known) email address, dump it." > > The question: > My setup is exim with spamassassin (and clamav) on top of Debian (root > access), but where abouts would I specify something like that? > > There are three other notable factors: > > 1. I don't want to dump the catch-all email, I quite often use things > like '[EMAIL PROTECTED]' so I know if my address gets passed on. > > 2. I don't want spamassassin to learn from the bounces, as I don't want > to miss legitimate bounces. > > 3. I'm not a sys admin, by any stretch of the imagination. Debian makes > it pretty easy to set up and maintain the email system, but I won't be > re-compiling anything ;) > > Thanks in advance for any pointers, > > -Alastair >
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