From ediaz at ultreia.es  Wed May 13 12:38:09 2009
From: ediaz at ultreia.es (Eduardo Diaz Comellas)
Date: Wed, 13 May 2009 21:38:09 +0200
Subject: [SA-exim] memcached for greylisting
Message-ID: <4A0B21A1.6050804@ultreia.es>

Hi!

In the exim users list it has been proposed to use memcached to store 
some values. As memcached implements record expiry natively, and can be 
easely shared in a network, it seems to be a great  option for greylisting.

This is the original post:

> I've managed to hook Exim into memcached using ${readsocket}. There are 
> many useful applications for this. Its inbuilt ability to automatically 
> expire data after a time period would make it ideal for greylisting for 
> example.
>
> If you want to see how I did it, see here:
>
> https://secure.grepular.com/blog/index.php/2009/05/13/accessing-memcached-from-exim/
>
> Ideally, Exim would have a native memcache interface letting you store 
> and retrieve values like this:
>
> ${memcache{set}{key}{value}{timeout}}
> ${memcached{get}{key}}
>
> But my solution is just as functional (less pretty)
>   
Regards

-- 
Eduardo Diaz Comellas -- ediaz at ultreia.es
Ultreia Comunicaciones S.L.



From marc at merlins.org  Wed May 13 18:06:33 2009
From: marc at merlins.org (Marc MERLIN)
Date: Wed, 13 May 2009 18:06:33 -0700
Subject: [SA-exim] memcached for greylisting
In-Reply-To: <4A0B21A1.6050804@ultreia.es>
References: <4A0B21A1.6050804@ultreia.es>
Message-ID: <20090514010633.GA21080@merlins.org>

On Wed, May 13, 2009 at 09:38:09PM +0200, Eduardo Diaz Comellas wrote:
> Hi!
> 
> In the exim users list it has been proposed to use memcached to store 
> some values. As memcached implements record expiry natively, and can be 
> easely shared in a network, it seems to be a great  option for greylisting.
> 
> This is the original post:
 
First, to be honest sa-exim more or less does what I wanted it to, and I
don't have the time nor desire to add lots of new features, especially since
most people seem to be using exiscan since it's good enough at what it does
spam-wise and built in exim.

Second, memcached doesn't survive a reboot from what I can tell. While there
isn't a compelling reason to change sa-exim's greylisting away from files on
disk that are easy to parse and manage, i also like the fact that I don't
lose the greylisting data if the server gets rebooted.

Marc
 
> > I've managed to hook Exim into memcached using ${readsocket}. There are 
> > many useful applications for this. Its inbuilt ability to automatically 
> > expire data after a time period would make it ideal for greylisting for 
> > example.
> >
> > If you want to see how I did it, see here:
> >
> > https://secure.grepular.com/blog/index.php/2009/05/13/accessing-memcached-from-exim/
> >
> > Ideally, Exim would have a native memcache interface letting you store 
> > and retrieve values like this:
> >
> > ${memcache{set}{key}{value}{timeout}}
> > ${memcached{get}{key}}
> >
> > But my solution is just as functional (less pretty)
> >   
> Regards
> 
> -- 
> Eduardo Diaz Comellas -- ediaz at ultreia.es
> Ultreia Comunicaciones S.L.
> 
> 
> _______________________________________________
> SA-Exim mailing list
> SA-Exim at lists.merlins.org
> http://lists.merlins.org/lists/listinfo/sa-exim
> 

-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/