Re: [exim] Exim 4.72: preventing backscatter

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Autor: Klaus Ethgen
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A: exim-users
Assumpte: Re: [exim] Exim 4.72: preventing backscatter
Am Do den 28. Aug 2014 um 17:32 schrieb Todd Lyons:
[Not trusted sender due to reverse DNS]
> In both of the above cases, greylisting instead of rejecting will
> solve the issue. Valid senders will be running legitimate mail
> servers that will queue and retry the mail later. Botnet mail servers
> will try once, won't both queueing, give up on that recipient, and
> move on to the next one.


That is true. Having a intelligent greylisting is a really sharp sword.
One way would be to use grossd.

Regards
Klaus

Ps. By the way, you don't need to have me in Cc when answering. I do
    read this list. :-)
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Klaus Ethgen                              http://www.ethgen.ch/
pub  4096R/4E20AF1C 2011-05-16   Klaus Ethgen <Klaus@???>
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