At my organization we are looking for our own email server which is Zimbra Collaboration Open Source, But we are really confused with on what type of server should we use to install this Organization email, Our count will be approx 100 with 5 GB space each.So we need a suggestion for which cloud service should be simple, good and cost effective at the same time.Zimbra is also having chat facility which we would like to integrate on this. But we refereed the zimbra website it says it needs a separate Ubuntu server.This should sync with the smartphones.
Zimbra Email Server on Cloud
email;architecture