Cluster mail system using FreeBSD

[bsd]

Hello,


I am looking for the best possible solution in order to setup a High  
availability mail cluster using FreeBSD (smtp/imap/pop server with  
1000 accounts).



Selected software are as followed :
-----------------------------------

- Postfix
- Amavisd-new
- SpamAssassin
- Courier Imap
- DCC-DCCD
- Clamav
- a web mail (not yet selected but probably horde)


The idea is to offer a simple and very efficient solution in order  
for the server to have a 100% uptime under any circumstances.


I would like (if possible) to stick to software available in the  
ports (for ease of maintenance).


I was first thinking about using Linux-HA aka. "heartbeat" and  
syncing the two boxes using rsync ?

What other solution would you think of ?

Any pointer will be very appreciated I need to build my offer quite  
fast.


Sincerly yours.


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Gregober ---> PGP ID --> 0x1BA3C2FD
bsd @at@ todoo.biz
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