To some, setting up an email server is a simple task. Buy a microsoft excange license, a few clicks and you are installed. While that works for some companies, alot of IT departments are looking at alternatives.
There are a number of reasons to be looking for a new mail server, maybe you have outgrown the old one, you might be looking for more or different functionality. Then there is the cost factor. MS exchange is (lets face it) a nice app when it works, but administration, cost and limitations such as total storage size can be restrictive.
There are many open source alternatives but when you are looking for a seamless, integrated solution to replace MS exchange there have been no alternatives that are simply plug and play, this is where MS is leaps ahead of anything else.
Unison is a new mail server on the block which provides an MS exchange type feature set while using a “fat” local client to access the mail. Unison is plug and play without the double dipping licensing costs of exchange and alot more functionality than the open source alternatives.
Unison initially was a pay per seat license model but soon (added) another mode of payment, the advertiser supported version. This is not a new idea but it is new in the corporate email circles where traditional pay per user licensing fees are king.
At Core Networks, we have not yet finished appraising Unison (it is installed and running) but so far we like what we see. In these current times when businesses are looking to save some costs, deploying a advertiser supported mail server that is of high quality and functionality can make alot of sense.