On Wed, 8 Jun 2011 01:27:57 -0400, Steve Spence wrote:
That what I found with most the open source /Linux mail products
that
customizing and extending can be difficult and a lot of time and
effort.
The exchange is one of the easiest ways to roll out large scale web
base
email if just expensive in upfront costs.
Interns of Hotmail they initially use to use Solaris for the MTA
and
storage and FreeBSD for the web services ( Apache ) they suppose of
migrated
windows by now using windows products Again I think this highly
customize
solution which may not be very useful
http://en.wikipedia.org/wiki/Hotmail
we went through a similar search for a high volume solution which
we could
customize and brand right now we using we high a hybrid of
(exchange/Icewarp/Atmail/ two layers of spam filtering )
As far as commercial packages go, Surgemail is worth a look. Very
affordable and insanely powerful and customizable. The support team is
the development team. It's not uncommon for bugs to be fixed in hours to
day and even new features requests to be added in days to weeks. Runs on
practically any major OS you prefer...
-Vinny