qmail-ldap cluster case study

Hi

I used to administer a qmail-ldap cluster for a group of companies  
with around 20 domains and 3000 e-mail accounts, receiving 150,000  
mails/day (most of which were SPAM).

I've written a small article about it and how we scaled the system  
from just one server to a cluster of seven. Not very technical (no  
config files or lower-level details), more of a case study/success  
story, but can give some ideas to someone who's starting in the  
fabulous world of MTA administration. :-)

http://www.bisente.com/blog/2008/10/02/cluster-de-correo-escalable-con-software-libre/?lan=english

Hope you find it interesting.

Regards

PS: don't have access to the config files as I don't work at that  
company any more, but can elaborate a little bit more any aspect of  
it, if memory serves...

-- 
   Vicente Aguilar <[email protected]> | http://www.bisente.com