Milter-greylist

shuttlebox wrote:
> On Tue, Apr 22, 2008 at 5:51 PM, Chris Hoogendyk
> <hoogendyk@...> wrote:
>   
<snip>
>>  3) My boss is talking like milter-greylist may have outlived its
>>  usefulness. It does cause headaches for lots of users who don't want
>>  mail delayed even if it is attributable to the other side being
>>  misconfigured. And, over the past year or so, it seems like more and
>>  more spammers have implemented resending (anyone tracking this have
>>  statistics?). Meanwhile, we have adopted a number of other mechanisms,
>>  including settings in sendmail.cf (by way of config.mc), that seem to be
>>  more effective, blocking things before they even get to milter-greylist.
>>  I know I'm asking the choir to commit blasphemy ;-) , but I thought
>>  perhaps others on this list might have comments on this.
>>     
>
> I also used to get a lot of complaints and requests to statically
> whitelist this and that until I started to use dnswl.org, after that
> it's a lot smoother. I also greylist hits from SORBS DUL for 3h to
> combat resends. Look in the wiki for a few setup examples:
> http://milter-greylist.wikidot.com/. I have a lot more filtering after
> the greylisting but I can't think of going back to not using it, after
> all it reduces the load with something like 80%

AND

Ondrej Valousek wrote:

<snip>
> 2. Sometimes I also feel like it is loosing its effectiveness so I have
> written a script to analyze sendmail logs - it turned out that its
> effectiveness is still >85% so yes, I still do receive a spam, but if it
> weren't for greylisting.... :-)
<snip>

Can either of you give specifics for how you determined those 
percentages and what they mean? Share your script? Have you been 
tracking it over time? And has it changed? Or is it resting on its laurels?

Thanks,



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Chris Hoogendyk

-
   O__  ---- Systems Administrator
  c/ /'_ --- Biology & Geology Departments
 (*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst 

<hoogendyk@...>

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Erd\ufffds 4