If you still think that mail server solution is only Microsoft Exchange? Think again!
Even though that MS Exchange and MS Outlook is well integrated with Windows XP/Vista and Active Directory, the cost to installation, maintenance the system is a nightmare.
Within the land of IT, nothing is a bigger pain to own, manage and run than Microsoft Exchange. Everywhere you go customers have horror stories about the installation, maintenance and, above all, uptime of their Microsoft Exchange implementations. And worse yet, they will all tell you they are paying top dollar for the privilege because the expertise needed to successfully run a Microsoft Exchange server is some of the most expensive in the IT labor pool.
E-mail is considered the most mission-critical, a simple fact that is only going to become more evident once more organizations begin using Exchange as the underpinning of a unified communications architecture that is going to tie voice and video to the Exchange server. And if you think people get upset when they can’t access their e-mail, imagine what will happen when they can’t make a call because the Exchange server is down.
Please read here on Exchange Equals Profits.
Maybe this why, one of my friend is trying to migrate their mail server from MS Exchange to Lotus Domino.
The truth is, if you going to have only mail server (web/pop/imap server), you better run linux/unix server, The are plenty of open source program that more than stable to run that.
But, if you want more than just mail server, there always be Lotus Domino.