I'm new in Zimbra community so this is my welcome thread

I've been installing Zimbra community edition and like it very much, however after reading some articles, i know that the community edition doesn't have Domain Admin feature.

Is this limitation only on GUI level? I was wondering if I can achieve the same thing via CLI commands (create domain admin via CLI)?

Also the "View Mail" feature I want to disable it, I've search the forum and bugzilla but can't find answer on how to disable that button. Since Zimbra is open source is it not possible to hack the theme to lets say resize the button to 1px * 1px so it's almost not visible ?

thank you