There are number of feature but among them Interface and user experienced is the best

It has a free tier that allows you to configure it in a windows server. It's a good tool for begginers to experiment with their own mail cloud solution.

With EmailEnable one is able to access email from anywhere and anytime since it uses a web browser as interface that allow viewing ,sending ,receiving, editing and deleting mails and this works out well. Has a feature of spam prevention that block and filter the spam thus allowing one never receive junk emails Allow one to redesign the look and the feel of your web mail since you can customize your own look by changing the color ,font ,adding company logo to you web mail,backgrounds etc. Contain a list server that enable one to subscribe and unsubscribe to a list which is an online discussion group or information mail out where emails are sent out to all the members