Hi,

I do not think that couple MX records would give you round-ribbon load 
balancing it is rather for the high availability purposes. What you should be 
looking at is LVS with backend processing dspam servers forwarding mail to 
one back-end machine. the destination server can be set up by ip if you want 
to have just one or if you have couple of them you can let it be send by smtp 
depending on the domain that they are in so it will look like this :

              DSPAM 
            /               \
LVS<                     >BACKEND MAIL SERVER
            \               /
              DSPAM

if that is what you want, or :

              DSPAM  ---> SMTP ---> BACKEND DEPENDING ON THE DOMAIN
            /               
LVS<                     
            \               
              DSPAM ---> SMTP ---> BACKEND DEPENDING ON THE DOMAIN


On Tuesday 23 January 2007 09:13, Patrik Jansson wrote:
> Hi,
> We're a web hosting company with around 15 shared servers with a mail
> server running on 80% of them. At the moment SpamAssassin is active on
> every mail server (FreeBSD and Windows) but it doesn't work very well.
> It's really hard (almost impossible) for our customers to train their SA
> database themselves which results in a very bad spam filter. I recently
> installed dspam on a private server and I'm very happy with it. It's
> easy to administer and has nice features.
>
> My question is, would it be possible with one or two (load balanced?)
> servers for mail filtering with dspam? How would that setup look like?
> Will MX10 point to the filtering server which (after filtering)
> redirects the mail to the correct server? But how will it know which is
> the correct server? We're running Exim and maybe the last question
> belongs to the exim-users list. How many email accounts can such a setup
> handle? I'm sure it depends on the hardware.
> I would appreciate any ideas and thoughts regarding this solution.
>
> Thanks,
> Patrik
-- 
Q:      Know what the difference between your latest project
        and putting wings on an elephant is?
A:      Who knows?  The elephant *might* fly, heh, heh...

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