I’m using the Zimbra Collaboration Suite for some days now and I have to say that I’m really happy with it. The user web interface is just awesome, easy to use and I love the Ajax stuff. I’m also using it on my iPhone and it runs perfectly. There was just one thing which made me feel a bit uncomfortable with. After the installation the Webmail component was just accessible via HTTP which is not encrypted. During the last years I got some bad  experience with other applications which needed to be changed from HTTP to HTTPS and this time I had a uneasy feeling but it was without any reason.

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