Re: [exim] Help with serialize_hosts option

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Author: Marc Sherman
Date:  
To: exim-users
Subject: Re: [exim] Help with serialize_hosts option
Terry Shows wrote:
>
> Just a history. Spammers have been hitting me so hard that concurrent
> incoming connections were overloading my server. Then rejections were
> overloading me on the outbound side. Some servers were doing the guessing
> game, sending me 100 or more emails to different "guessed" addresses on my
> domain. The rejections of these were blowing me away.


You're solving the wrong problem. Instead of trying to process
"rejections" (which, as you describe them, must be bounce messages) more
efficiently, you should prevent them from being sent at all by rejecting
the spam at SMTP time. By accepting and then bouncing the spam, you've
likely become a spammer yourself; chances are good that most of the
return addresses to which you're sending bounce messages are in fact forged.

For details on how to reject the spam at SMTP time, see chapters 39 and
40 of the documentation:
http://exim.org/exim-html-4.62/doc/html/spec_html/ch39.html
http://exim.org/exim-html-4.62/doc/html/spec_html/ch40.html

- Marc