I am new to Linux & Zimbra. I have a small/medium business and we have our mail hosted with google apps right now. Our office has an internal mail server called IQuinox (Postmaster) installed. It picks the mail from the web and distributes it to the users on Iquinox. While sending the mail it checks if the mail is for internal users (same domain) or external users. If its internal (same domain) the mail is not sent out and is directed to the respective user thus saving upload and download again.
The users access mail through their mail clients like Outoook Express/Eudora/Thunderbird etc.
Can I have something similar with Zimbra. I think Zimbra can give me more functionalities then my current deployment. Would appreciate any kind of help. I saw a similar question but the thread just ended abruptly.