I'd searched high and low for an email server that wouldn't require me to be a full time administrator. Many, while free , took too much of my time away from other tasks in order to manage or study up on, and others were so expensive as to put them out of reach of mere mortals(ex: CGP).

KMS was, for me at least, approachable and easy enough to understand that it took little time to configure a working SMTP/POP/IMAP server with options. To get the full benefit did take some time to pour over the documentation because, to be quite frank, there are some areas that simply are not explained very well or at all.

That being said I've been more than impressed by its stability and only wish that Kerio had a more liberal upgrade policy because you either get locked into their "subscription" or pay nearly the full price over and over and over. For larger enterprises I can see the benefit but for now I'll stay with an albeit "older" version but one that works.

This is a good product and I look forward to where its headed.

I have been using kerio mailserver for about 3 months now, and have been very happy with the results. The user interface is very simple, and the webmail is the first i've seen that really rivals exchange's webmail. For the price, features, and ease of use, this program is right on. The spam filter has been very good, the outlook integration is almost seamless, and the simplicity of the admin interface makes it simple to implement on any platform. Kerio's support team has been wonderful so far, walking me through any issues i had, from setup to bugfixes. I am using this with about 80 users, and they are happier with this then they were with exchange 5.

I've been using 5.7 for a while now and it has been bullet proof running on a Redhat 9 server. I just installed version 6 on a test server and I'm blown away. The web interface is absolutely awesome! Thus far I haven't found any major bugs. Just make sure you turn your popup blocker off for your server address. I've also found that Mozilla works the best with the new interface. This thing blows my old Exchange server away! Give me iCal support on the server side via WebDav, and this mailserver will be perfect for every platform out there!