we've been operating ISPMan+openldap+postfix+Cyrus+horde, but then moved 
our services to Plesk. 
Having looked back, I'd still go again with Plesk. It saves a lot of time,
and normally a sysadmin's working time is more expensive than the software 
license.

It has its limitations and unconveniences, but in general it's a great product.

A strong advice is to put a greylisting server in front of it on a separate 
machine (might be a virtual machine).

Besides, I studied together in the same University 
with Sw-Soft's core team ;-)

regards,
stan


--- Nico -telmich- Schottelius <[EMAIL PROTECTED]> wrote:

> Hello!
> 
> Just wanted to ask what setup you use or recommend for large
> scale sites (~10k users, some hundreds of imap(s), smtp, webmail
> connections, about 5-10 mails incoming and outgoing per second):

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