postfix on 64 bit servers

[Stephane Durieux <durieux42@yahoo.fr>]

Hello 

I am trying to install a mail server on a 64 bit architecture.
I have few questions about it 

First, the interest of doing it (if the memory doesn t exceed 4 Go)

Secondly, how can I install a 64 bit version of postfix ?
from sources 
or is it automatic on a 64 bit kernel (I really don t see how but ? )

Thanks for reply

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