postfix mail server

[Stephane Durieux <durieux42@yahoo.fr>]

hello,

Building a mail server for 200/300 users (able to grow
till a thousand) and as a newbie I need an advice

My choice a turned to postfix with virtual mailboxes,
courrier-imaps, squirrel mail (https), postgrey and
dspam spam, amavis and clamav against virus, iptables
for undesired packets.

The "framework" is this one :
all on the mail server except squirrelmail 

The problem is that someone has adviced me to put
instead a front device with squirrelmail with iptables
and squirrelmail with a ssh tunnel to smtp and imap
services 

But I don t really understand the gain of that
framework in terms of security or performance 

If someone can help me

Thanks 




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