Architecture: questions

Hi all,

I'd like to receive advice related to the architecture of ispman. I 
apologize if I have not completely grasped the overall design yet. I would 
like to ask 3 questions:

1. I succeed in managing multiple domains on a single machine. Probably I 
can also manage a couple of machines, one with an SMTP server; the other 
with an IMAP server.  However, how would I manage 2 domains, using a single 
SMTP server but 2 IMAP servers, one per domain? In particular, my problem 
is how to configure Postfix in such a case, because Postfix seems to point 
to a unique lmtpd server.

2. Antispam and Antivirus :  assume we use several SMTP servers in 
parallel, either with DNS-based load-balancing or assigned based on the 
domain.  It seems to me that the machines running Postfix are should also 
run spamassassin and the antivirus. Yet, I would like to avoid to install 
spamassassin and the antivirus on each SMTP host, since they cause a too 
heavy load.  Instead, I'd prefer to install these services on a single, 
separate host where all queues are shared. Can you tell me if this is 
possible and how to configure it?

3. WebMail : for those who installed WebMails. Did you install a webmail 
for each IMAP server or would it be possible to have a single webmail 
server for multiple IMAP daemons?

Ciao & Thank you in advance.
Yours Ezio.


--
Ezio Paglia

Servizi Informatici (SED)
Comune di Grosseto




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