If you are looking to lower your cost maintaining and managing your company email here's a list of alternative email servers out there.
- Google Apps provides custom email like JohnDoe@king.net. Google Calendar organize your schedule and events. Google Docs share online documents, presentations, and spreadsheets. I personally using spreadsheet sharing to keep the book updated with other personnel. Google Sites for website and group wikis, very limited features at this time. I have to outsource my CMS website. And if the 7GB free email is not big enough for you, then you might need to consider the Premium version. Check it at http://www.google.com/apps
- Zimbra is now a Yahoo company but still support open source version of mail server. Is truly a modern, innovative messaging and collaboration application according to the site. I personally haven't tried this software but looking forward to test it. I read the features available for Zimbra and might consider it as good alternative mail server for your costly Exchange Server. Don't get me wrong, I love Exchange Server and I hope Microsoft will consider releasing an open source version or just lower the cost of ownership.
- Kerio is another mail server that needs your attention or let your IT Manager check this article. "Kerio MailServer is a comprehensive Microsoft Exchange alternative that simplifies administration and lower cost of ownership". (2009, Kerio.com).
- other's free mail product that I forgot the name.
Well, this is a short list for you to consider. I know we have hundreds out there. If you know one and care to share with us, please use the comment to post.