http://www.etomicmail.com Zimbra WhitepaperZimbra is the Microsoft Exchange replacement, offering more functionality, less maintenance and overhead, and it cost less. Zimbra ZCS Network Edition provides feature rich email, contacts, and group calendaring.
Zimbra Email Collaboration Suite is an open source server and client technology for next-generation enterprise messaging and collaboration. Zimbra delivers innovation for both the administrator and the end-user as well as compatibility with existing infrastructure and applications (both open source and proprietary).
If you're running zimbra server, you can check out my blog post on setting up SSL. It can be tricky.
Search Google for:
Installing $12.99 GoDaddy SSL Certificate on Zimbra versions 5 and 6
jggonz 4 months ago