newbie Q...first time install/setup

The install/setup of the Open Source Ed looks simple-enough.

I'm a Linux user, but I haven't setup a mail server just yet.

Are there any posts/URLs to adequately securing the installation post-install? For example, does the default Zimbra config allow it to be an "open relay" (sounds bad)?

Why no firewall install recommended? Although this server will be behind a firewall, I don't see the reason to allow all ports open to everyone by default.

Basically, please forgive the newbie questions and let me know where I should go to help myself figure this out? (I know that stmt opens-me-up for a couple of wisecracks...)

Thanks in advance,
AJ

1) Zimbra is NOT open relay by default
2) http://www.zimbra.com/community/documentation.html
lots of docs based on our install are avail at above link
3) u can always search the board for any questions you may have

Raj

Thanks so much for your quick reply!

I'll try the install and then come back with specific questions (and promise to search first).