[CentOS] How to size an email server to handle 5 million emails per day

[David Hrbáč]

Kai Schaetzl napsal(a):
> Erick Perez wrote on Thu, 23 Aug 2007 21:52:20 -0500:
> 
>> 5 million emails a day
> 
> so, 4 million of that are spam? The ressources you need depend very much 
> on how you deal with spam. If you take good measures at MTA level the 
> system backend with SA etc. has only to deal with 1 million, otherwise it 
> has to deal with five times of that. Quite a difference.
> 
> Kai
> 

Some hints:
- if there are 4 Mil of spam consider greylisting,
http://postgrey.schweikert.ch/ helps a lot SA
- use local DNS cache
David Hrbáč